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Subtypes of HIV

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430: 31: 649:. If the virus has a low set-point viral load, the host will live longer, and there is a greater probability that the virus will be transmitted to another individual. If the virus has a high set-point viral load, the host will live for a shorter amount of time and there is a lower probability that the virus will be transmitted to another individual. HIV has evolved to maximize the number of infections to other hosts, and this tendency for selection to favor intermediate strains shows that HIV undergoes stabilizing selection. 422: 62: 618:
dependent on which virus was contracted first. HIV-1 tends to out compete HIV-2 for disease progression. Co-infection seems to be a growing problem globally as time progresses, with most cases being identified in West African countries, as well as some cases in the USA. A study found that individuals who contract HIV-2 before HIV-1 tend to have a slower rate of disease progression, suggesting that the immune response to HIV-2 may limit the proliferation of HIV-1.
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towards a population level. Another includes the slow evolution of viral load due to viral load mutations being neutral within the host. The last mechanism focuses on the virus' preference to transmit founding viral strains stored during the early stages of infection. This preference of the virus to transmit its stored genome copies explains why HIV evolves more quickly within the host than between hosts.
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evaluated. Combination regimens of the above listed therapies are being looked into as well, also showing variable effect depending on the types of therapies combined. While the mechanisms are not clearly understood for HIV-1 and HIV-2, it is known that they use different pathways and patterns, making the algorithms used to evaluate HIV-1 resistance-associated mutations irrelevant to HIV-2.
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HIV-2 diagnosis can be made when a patient has no symptoms but positive blood work indicating the individual has HIV. The Multispot HIV-1/HIV-2 Rapid Test is currently the only FDA approved method for such differentiation between the two viruses. Recommendations for the screening and diagnosis of HIV
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The O ("Outlier") group has infected about 100,000 individuals located in West-Central Africa and is not usually seen outside of that area. It is reportedly most common in Cameroon, where a 1997 survey found that about 2% of HIV-positive samples were from Group O. Its zoonotic origin is SIVgor, which
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The rapid evolution of HIV can be attributed to its high mutation rate. During the early stages of mutation, evolution appears to be neutral due to the absence of an evolutionary response. However, when examining the virus in several different individuals, convergent mutations can be found appearing
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HIV-1 is the most common and most pathogenic strain of the virus. As of 2022, approximately 1.3 million such infections occur annually. Scientists divide HIV-1 into a major group (group M) and two or more minor groups, namely groups N, O and possibly a group P. Each group is believed to represent an
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If a pregnant mother is exposed, screening is performed as normal. If HIV-2 is present, a number of perinatal ART drugs may be given as a prophylactic to lower the risk of mother-to-child transmission. After the child is born, a standard six-week regimen of these prophylactics should be initiated.
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Choice of initial and/or second-line therapy for HIV-2 has not yet been defined. HIV-2 appears to be resistant to NNRTIs intrinsically, but may be sensitive to NRTIs, though the mechanism is poorly understood. Protease inhibitors have shown variable effect, while integrase inhibitors are also being
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HIV-2 has been found to be less pathogenic than HIV-1. The mechanism of HIV-2 is not clearly defined, nor the difference from HIV-1, however the transmission rate is much lower in HIV-2 than HIV-1. Both viruses can lead to AIDS in infected individuals and both can mutate to develop drug resistance.
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testing, must be performed to distinguish which infection is present. According to the NIH, a differential diagnosis of HIV-2 should be considered when a person is of West African descent or has had sexual contact or shared needles with such a person. West Africa is at the highest risk as it is the
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The spatial movement of these subtypes moved along the railways and waterways of the DRC from Kinshasa to these other areas. These subtypes are sometimes further split into sub-subtypes such as A1 and A2 or F1 and F2. In 2015, the HIV strain CRF19, a recombinant of subtype A, subtype D, and subtype
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and genetic mutations, which have been tracked and analyzed. The Stanford HIV Drug Resistance Database and the International AIDS Society publish lists of the most important of these; first year listing 80 common mutations, and the latest year 93 common mutations, and made available through the
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There are six additional known HIV-2 groups, each having been found in just one person. They all seem to derive from independent transmissions from sooty mangabeys to humans. Groups C and D have been found in two people from Liberia, groups E and F have been discovered in two people from Sierra
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The virus has also evolved to become more infectious between hosts. There are three different mechanisms that allow HIV to evolve at a population level. One includes the continuous battle to evolve and overcome the immune system which slows down the evolution of HIV and shifts the virus’ focus
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In 2009, a newly analyzed HIV sequence was reported to have greater similarity to SIVgor, than SIVcpz. The virus had been isolated from a Cameroonian woman residing in France who was diagnosed with HIV-1 infection in 2004. The scientists reporting this sequence placed it in a proposed Group P
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Each virus can be contracted individually, or they can be contracted together in what is referred to as co-infection. HIV-2 seems to have lower mortality rates, less severe symptoms and slower progression to AIDS than HIV-1 alone or the co-infection. In co-infection, however, this is largely
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Subtype B is the dominant form in Europe, the Americas, Japan, and Australia. In addition, subtype B is the most common form in the Middle East and North Africa. It may have been exported from Africa when Haitian professionals visited Kinshasa in the 1960s and brought it to Haiti in
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The 'N' stands for "non-M, non-O". This group was discovered by a Franco-Cameroonian team in 1998, when they identified and isolated the HIV-1 variant strain, YBF380, from a Cameroonian woman who died of AIDS in 1995. When tested, the YBF380 variant reacted with an
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With 'M' for "major", this is by far the most common type of HIV, with more than 90% of HIV/AIDS cases caused from infection with HIV-1 group M viruses. This major HIV virus, which was the source of pre-1960 pandemic viruses, originated in the 1920s in
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Subtype E was originally used to describe a strain that is now accounted for as the combined strain CRF01_AE. This means the original, singular, E strain has disappeared, but we know it existed, as it is visible in this combined strain
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infects gorillas (rather than the more common source, SIVcpz). The group caused some concern because it could not be detected by early versions of the HIV-1 test kits. More advanced
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Bobkov AF, Kazennova EV, Selimova LM, Khanina TA, Ryabov GS, Bobkova MR, et al. (October 2004). "Temporal trends in the HIV-1 epidemic in Russia: predominance of subtype A".
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has always been to use enzyme immunoassays that detect HIV-1, HIV-1 group O, and HIV-2. When screening the combination, if the test is positive followed by an indeterminate HIV-1
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show that the virus most closely related to the two strains of HIV-2 which spread considerably in humans (HIV-2 groups A and B) is the SIVsmm found in the sooty mangabeys of the
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But P appears to have crossed over from a gorilla; it was discovered only last year, and in only one woman, who was from Cameroon, where lowland gorillas are hunted for meat.
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from SIVcpz rather than with those of Group M or Group O, indicating it was indeed a novel strain of HIV-1. As of 2015, fewer than 20 Group N infections have been recorded.
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HIV-2 is mostly found in Africa, and therefore less recognized elsewhere in the world. The first identification of HIV-2 occurred in 1985 in Senegal by microbiologist
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Nyamweya S, Hegedus A, Jaye A, Rowland-Jones S, Flanagan KL, Macallan DC (July 2013). "Comparing HIV-1 and HIV-2 infection: Lessons for viral immunopathogenesis".
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Subtype I was originally used to describe a strain that is now accounted for as CRF04_cpx, with the cpx for a "complex" recombination of several subtypes.
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HIV-1 viruses can be further stratified into groups M, N, O, and P. Among these, HIV-1 group M viruses are the most prevalent, infecting nearly 90% of
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and his collaborators. The first case in the United States was in 1987. The first confirmed case of HIV-2 was a Portuguese man who was treated at the
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between viruses of different subtypes which are in addition each given a number. CRF12_BF, for example, is a recombination between subtypes B and F.
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HIV is evolving toward a milder form, but it is still "an awfully long way" from no longer being deadly, with severe variants still appearing.
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Leone, and groups G and H have been detected in two people from the Ivory Coast. Each of these HIV-2 strains, for which humans are probably
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Geographic distribution of HIV-1 subtypes, Circulating Recombinant Forms (CRFs), and Unique Recombinant Forms (URFs) in Africa, 2015–2020
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Bryceson A, Tomkins A, Ridley D, Warhurst D, Goldstone A, Bayliss G, et al. (July 1988). "HIV-2-associated AIDS in the 1970s".
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type 1 (HIV-1) and HIV type 2 (HIV-2). These subtypes have distinct genetic differences and are associated with different
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Disease monitoring in patients with HIV-2 includes clinical evaluation and CD4 cell counts, while treatment includes
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Although ICTV lists HIV-1 and HIV-2 as distinct species from SIV, they do cladistically fall into the group of SIV.
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Breast milk may also contain viral particles of HIV-2; therefore, breastfeeding is strictly advised against.
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Kouri V, Khouri R, Alemán Y, Abrahantes Y, Vercauteren J, Pineda-Peña AC, et al. (March 2015).
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Subtype C is the dominant form in Southern Africa, Eastern Africa, India, Nepal, and parts of China.
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HIV-1 exhibits a genetic relation to viruses indigenous to chimpanzees and gorillas that inhabit
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Wymant C, Bezemer D, Blanquart F, Ferretti L, Gall A, Hall M, et al. (February 2022).
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Faria NR, Rambaut A, Suchard MA, Baele G, Bedford T, Ward MJ, et al. (October 2014).
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There are eight known HIV-2 groups, designated A to H. Of these, only groups A and B are
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Guglielmi G (February 2022). "Highly virulent HIV variant found circulating in Europe".
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Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
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Isolates of HIV-1 and HIV-2 with resistance to antiretroviral drugs arise through
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where he lived between 1956 and 1966. His pathological diagnosis at the time was
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Subtype J is primarily found in North, Central and West Africa, and the Caribbean
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Sallam M, Şahin GÖ, Ingman M, Widell A, Esbjörnsson J, Medstrand P (July 2017).
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Proceedings of the National Academy of Sciences of the United States of America
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Proceedings of the National Academy of Sciences of the United States of America
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and later died in 1987. He was believed to have been exposed to the disease in
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HIV evolution within a host influences factors including the virus' set-point
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than HIV-1 M group viruses, although HIV-2 is also known to still cause AIDS.
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Subtype F has been found in central Africa, South America and Eastern Europe.
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Fraser C, Hollingsworth TD, Chapman R, de Wolf F, Hanage WP (October 2007).
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Subtype G (and the CRF02_AG) have been found in Africa and central Europe.
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strain, which infects chimpanzees. The M group is subdivided further into
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Geographic distribution of subtyped sequences in the GenBank HIV Database
1535: 924:"In-Silico Identification of New Genes in HIV-1 by ORF Prediction Method" 536: 243: 2507: 2254: 1966:"Donor Screening Assays for Infectious Agents and HIV Diagnostic Assays" 414:, was found to be strongly associated with rapid progression to AIDS in 4045: 4002: 3973: 3968: 3855: 3847: 2958: 2800: 2628: 1908: 814: 789: 646: 567: 532: 204: 170: 146: 1167: 1021: 4040: 3769: 3729: 2207: 2106: 853:. Vaccines • Special Section on Evolutionary and systems immunology. 460: 270: 86: 2550: 2150:"HIV-2 is Deadlier Than Thought, Despite Slower Progression to AIDS" 1783: 1704: 1679: 1210: 280:
HIV-2 viruses are generally considered to be less virulent and less
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Giovanetti M, Ciccozzi M, Parolin C, Borsetti A (December 2020).
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3D macromolecular structures of HIV-1 at the EM Data Bank(EMDB)
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Subtype D is generally only seen in Eastern and central Africa.
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European and Developing Countries Clinical Trials Partnership
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One of the prevailing challenges in the pursuit of effective
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have now been developed to detect both Group O and Group N.
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WHO disease staging system for HIV infection and disease
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Hemelaar J, Gouws E, Ghys PD, Osmanov S (October 2006).
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List of HIV/AIDS cases and deaths registered by region
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Discovery and development of CCR5 receptor antagonists
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International Research Journal of Biological Sciences
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data. Certain subtypes are known for their increased
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List of countries by HIV/AIDS adult prevalence rate
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President's Emergency Plan for AIDS Relief (PEPFAR)
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Joint United Nations Programme on HIV/AIDS (UNAIDS)
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Boston, MA: Harvard University. 2018-06-29 1763: 1518:Mourez T, Simon F, Plantier JC (July 2013). 946: 944: 659: 277:to different medications used to treat HIV. 16:Variants of the human immunodeficiency virus 2746:Diffuse infiltrative lymphocytosis syndrome 2279: 2039: 2037: 1915: 1622: 1001: 922:Dhar DV, Amit P, Kumar MS (November 2012). 745:Cold Spring Harbor Perspectives in Medicine 592:nucleoside reverse transcriptase inhibitors 519:HIV-2 is closely related to SIV endemic in 3704: 3690: 2979:People With AIDS Self-Empowerment Movement 2596: 2582: 2237:Bons E, Bertels F, Regoes RR (July 2018). 1051: 1049: 1047: 844: 781: 642:in these viral populations independently. 29: 2506: 2496: 2431: 2408: 2385: 2375: 2326: 2316: 2262: 2171: 2069: 2017: 1835: 1703: 1646: 1605: 1595: 1543: 1494: 1437: 1427: 1368: 1319: 1280: 1249: 1175: 1124: 1114: 984: 941: 870: 813: 764: 738: 207:included but traditionally excluded taxa 2125: 2123: 2034: 1201: 1199: 1197: 1195: 1055: 428: 420: 1671: 1044: 393:Subtype H is limited to central Africa. 239:patterns and clinical characteristics. 4063: 2147: 2093: 2091: 2089: 1841: 741:"Origins of HIV and the AIDS pandemic" 3685: 3015:Discredited HIV/AIDS origins theories 2577: 2182:Indian Journal of Medical Micobiology 2120: 1901:"Human Immunodeficiency Virus Type 2" 1301: 1192: 902:UNAIDS 2023 epidemiological estimates 488:London Hospital for Tropical Diseases 1467:AIDS Research and Human Retroviruses 1156:Transfusion Medicine and Hemotherapy 1152:"Human Immunodeficiency Virus (HIV)" 739:Sharp PM, Hahn BH (September 2011). 231:include two main subtypes, known as 3134:The Freddie Mercury Tribute Concert 2603: 2086: 1251:10.1097/01.aids.0000247564.73009.bc 261:and are responsible for the global 13: 2010:10.1128/JVI.79.19.12515-12527.2005 845:Gary EN, Weiner DB (August 2020). 14: 4092: 4008:Pelvic inflammatory disease (PID) 2720:Countries by AIDS prevalence rate 2535: 2411:"HIV evolving 'into milder form'" 847:"DNA vaccines: prime time is now" 3181:Democratic Republic of the Congo 2741:AIDS-defining clinical condition 1648:10.1097/00002030-199704000-00013 502:, but an analysis of his stored 425:HIV-1 subtype prevalence in 2002 405:Subtype L is limited to the DRC. 321:of HIV-1 contains a total of 39 60: 4050:Non-gonococcal urethritis (NGU) 3713:Sexually transmitted infections 2464: 2425: 2402: 2343: 2230: 2141: 1958: 1893: 1876:"The Senegal Sex Workers Study" 1868: 1728: 1511: 1454: 1403: 1385: 1336: 1295: 1281:Weintraub K (6 November 2019). 1274: 1082: 790:"Recombination in AIDS viruses" 325:(ORFs) across all six possible 24:Human immunodeficiency viruses 1209:. 3 March 2008. Archived from 915: 887: 838: 794:Journal of Molecular Evolution 720: 602:(NNRTIs) with the addition of 302: 195:Human immunodeficiency virus 2 188:Human immunodeficiency virus 1 1: 3050:Misconceptions about HIV/AIDS 3030:International AIDS Conference 2984:HIV/AIDS in the porn industry 2927:Discrimination against people 2409:Gallagher J (December 2014). 2148:Baltic S (11 December 2018). 1936:10.1016/s0140-6736(88)92325-2 1736:"Abbott RealTime HIV-1 assay" 1524:Clinical Microbiology Reviews 1116:10.1016/j.heliyon.2017.e00352 1060:Viral Sex; The Nature of AIDS 851:Current Opinion in Immunology 713: 574: 315:simian immunodeficiency virus 216:Simian immunodeficiency virus 3782:Mycoplasma hominis infection 2910:Catholic Church and HIV/AIDS 2791:HIV Drug Resistance Database 636: 621: 604:CCR5 co-receptor antagonists 566:, a follow-up test, such as 550: 348:Democratic Republic of Congo 313:independent transmission of 7: 3211:CĂ´te d'Ivoire (Ivory Coast) 3045:Media portrayal of HIV/AIDS 2974:List of HIV-positive people 2196:Reviews in Medical Virology 1814:"New HIV strain discovered" 1361:10.1016/j.ebiom.2015.01.015 1321:10.1126/science.346.6205.21 1010:Journal of Medical Virology 757:10.1101/cshperspect.a006841 676: 10: 4097: 3111:Reports from the Holocaust 3035:International AIDS Society 3025:Elton John AIDS Foundation 2442:10.1038/d41586-022-00317-x 625: 578: 554: 466: 453: 437: 332: 291:is the virus's pronounced 3984: 3869: 3846: 3821: 3720: 3661: 3631: 3583: 3551: 3501: 3492: 3464: 3299: 3156: 3147: 3070:Treatment Action Campaign 3007: 2892: 2824: 2786:Tuberculosis co-infection 2728: 2649:disease progression rates 2616: 863:10.1016/j.coi.2020.01.006 660:Drug resistance mutations 211: 203: 183: 178: 57:Scientific classification 55: 37: 28: 23: 4081:Infraspecific virus taxa 3746:lymphogranuloma venereum 2796:Innate resistance to HIV 2766:Neurocognitive disorders 1429:10.3390/pathogens9121072 1393:"What are HIV and AIDS?" 1302:Cohen J (October 2014). 1162:(3): 203–222. May 2016. 693:Epidemiology of HIV/AIDS 477: 319:complete genome sequence 307: 3763:Klebsiella granulomatis 3117:AIDS–Holocaust metaphor 3100:Gay Men's Health Crisis 2776:Opportunistic infection 2498:10.1126/science.abk1688 2377:10.1073/pnas.1413339111 2318:10.1073/pnas.0708559104 1880:Harvard AIDS Initiative 1597:10.1073/pnas.1502022112 977:10.1126/science.1256739 588:anti-retroviral therapy 3811:Ureaplasma urealyticum 2944:HIV-affected community 2884:HIV and homosexual men 2062:10.1098/rstb.2001.0867 1845:(September 16, 2010). 581:Management of HIV/AIDS 434: 426: 259:people living with HIV 254:West African primate. 3957:Molluscum contagiosum 3836:Trichomonas vaginalis 3775:Neisseria gonorrhoeae 3751:Chlamydia trachomatis 3124:Silence=Death Project 2922:Criminal transmission 2842:Multiple sex partners 2184:, (2012) 30(1): 6–15. 2099:"Clinical Guidelines" 1479:10.1089/aid.2015.0318 571:origin of the virus. 557:Diagnosis of HIV/AIDS 529:Phylogenetic analyses 500:enterovirus infection 432: 424: 364:genetic recombination 3917:Human papillomavirus 3806:Ureaplasma infection 3446:United Arab Emirates 2917:Circumcision and HIV 2874:City of Hope Patient 2634:structure and genome 1911:on 18 February 2009. 1536:10.1128/cmr.00012-13 1213:on 13 September 2008 698:Timeline of HIV/AIDS 525:Cercocebus atys atys 410:G, with a subtype D 3735:Haemophilus ducreyi 2994:AIDS Memorial Quilt 2806:HIV-positive people 2489:2022Sci...375..540T 2368:2014PNAS..111E5393P 2362:(50): E5393–E5400. 2309:2007PNAS..10417441F 2303:(44): 17441–17446. 2004:(19): 12515–12527. 1998:Journal of Virology 1696:2006Natur.444..164V 1588:2015PNAS..112E1343D 1582:(11): E1343–E1352. 1288:Scientific American 1107:2017Heliy...300352S 1056:Goudsmit J (1997). 969:2014Sci...346...56F 806:1995JMolE..40..249R 688:History of HIV/AIDS 596:protease inhibitors 323:open reading frames 293:genetic variability 3799:Treponema pallidum 3787:Mycoplasma hominis 3571:Dominican Republic 2954:HIV/AIDS denialism 2879:Women and HIV/AIDS 2869:The London Patient 2736:Signs and symptoms 2644:CDC classification 2562:2020-08-08 at the 815:10.1007/BF00163230 683:HIV superinfection 435: 427: 4058: 4057: 3950:HSV-1 & HSV-2 3938:Hepatitis B virus 3679: 3678: 3657: 3656: 3579: 3578: 3060:The SING Campaign 2949:HIV/AIDS activism 2937:Cost of treatment 2859:Timothy Ray Brown 2854:World AIDS Museum 2483:(6580): 540–545. 2255:10.1093/ve/vey029 2056:(1410): 911–920. 1905:HIV/AIDS Workshop 1168:10.1159/000445852 1075:978-0-19-509728-3 1022:10.1002/jmv.20177 703:HIV/AIDS research 666:natural selection 628:HIV and pregnancy 608:fusion inhibitors 496:cryptosporidiosis 289:management of HIV 225: 224: 219:(subgroups i, ii) 160:Orthoretrovirinae 51: 40:Phylogenetic tree 4088: 4037: 4018: 3999: 3706: 3699: 3692: 3683: 3682: 3649:Papua New Guinea 3499: 3498: 3154: 3153: 2598: 2591: 2584: 2575: 2574: 2529: 2528: 2510: 2500: 2468: 2462: 2461: 2429: 2423: 2422: 2420: 2418: 2406: 2400: 2399: 2389: 2379: 2347: 2341: 2340: 2330: 2320: 2288: 2277: 2276: 2266: 2234: 2228: 2227: 2208:10.1002/rmv.1739 2191: 2185: 2178: 2169: 2168: 2166: 2165: 2156:. Archived from 2145: 2139: 2138: 2127: 2118: 2117: 2115: 2114: 2095: 2084: 2083: 2073: 2041: 2032: 2031: 2021: 1989: 1978: 1977: 1962: 1956: 1955: 1919: 1913: 1912: 1907:. Archived from 1897: 1891: 1890: 1888: 1887: 1872: 1866: 1865: 1860: 1859: 1839: 1833: 1832: 1830: 1829: 1822:Associated Press 1810: 1804: 1803: 1767: 1761: 1760: 1758: 1757: 1751: 1745:. Archived from 1743:Abbott Molecular 1740: 1732: 1726: 1725: 1707: 1675: 1669: 1668: 1650: 1626: 1620: 1619: 1609: 1599: 1567: 1558: 1557: 1547: 1515: 1509: 1508: 1498: 1458: 1452: 1451: 1441: 1431: 1407: 1401: 1400: 1389: 1383: 1382: 1372: 1340: 1334: 1333: 1323: 1299: 1293: 1292: 1278: 1272: 1271: 1253: 1229: 1223: 1222: 1220: 1218: 1203: 1190: 1189: 1179: 1148: 1139: 1138: 1128: 1118: 1086: 1080: 1079: 1063: 1053: 1042: 1041: 1005: 999: 998: 988: 948: 939: 938: 928: 919: 913: 912: 910: 909: 899: 891: 885: 884: 874: 842: 836: 835: 817: 785: 779: 778: 768: 736: 727: 724: 484:Souleymane Mboup 267:genetic sequence 179:Groups included 65: 64: 38: 33: 21: 20: 4096: 4095: 4091: 4090: 4089: 4087: 4086: 4085: 4061: 4060: 4059: 4054: 4033: 4014: 3995: 3986: 3980: 3924:Genital warts ( 3865: 3842: 3817: 3716: 3710: 3680: 3675: 3653: 3627: 3575: 3547: 3488: 3460: 3406:Myanmar (Burma) 3295: 3143: 3129:Day Without Art 3075:The Global Fund 3003: 2932:Economic impact 2888: 2820: 2724: 2676:pathophysiology 2612: 2602: 2564:Wayback Machine 2538: 2533: 2532: 2469: 2465: 2430: 2426: 2416: 2414: 2407: 2403: 2348: 2344: 2289: 2280: 2243:Virus Evolution 2235: 2231: 2192: 2188: 2179: 2172: 2163: 2161: 2146: 2142: 2129: 2128: 2121: 2112: 2110: 2097: 2096: 2087: 2042: 2035: 1990: 1981: 1976:on 11 May 2009. 1964: 1963: 1959: 1920: 1916: 1899: 1898: 1894: 1885: 1883: 1874: 1873: 1869: 1857: 1855: 1840: 1836: 1827: 1825: 1812: 1811: 1807: 1784:10.1038/nm.2016 1772:Nature Medicine 1768: 1764: 1755: 1753: 1749: 1738: 1734: 1733: 1729: 1705:10.1038/444164a 1676: 1672: 1627: 1623: 1568: 1561: 1516: 1512: 1459: 1455: 1408: 1404: 1391: 1390: 1386: 1341: 1337: 1314:(6205): 21–22. 1300: 1296: 1279: 1275: 1244:(16): W13–W23. 1230: 1226: 1216: 1214: 1205: 1204: 1193: 1150: 1149: 1142: 1087: 1083: 1076: 1054: 1045: 1006: 1002: 963:(6205): 56–61. 949: 942: 926: 920: 916: 907: 905: 897: 893: 892: 888: 843: 839: 786: 782: 737: 730: 725: 721: 716: 679: 662: 639: 630: 624: 583: 577: 559: 553: 521:sooty mangabeys 480: 469: 456: 440: 352:zoonotic origin 335: 310: 305: 297:viral evolution 275:drug resistance 237:epidemiological 229:subtypes of HIV 124:Revtraviricetes 59: 17: 12: 11: 5: 4094: 4084: 4083: 4078: 4073: 4056: 4055: 4053: 4052: 4043: 4038: 4030: 4029: 4024: 4019: 4011: 4010: 4005: 4000: 3992: 3990: 3982: 3981: 3979: 3978: 3966: 3954: 3953: 3952: 3945:Herpes simplex 3942: 3930: 3921: 3913: 3912: 3911: 3906: 3901: 3896: 3888: 3875: 3873: 3867: 3866: 3864: 3863: 3858: 3852: 3850: 3844: 3843: 3841: 3840: 3831:Trichomoniasis 3827: 3825: 3819: 3818: 3816: 3815: 3803: 3791: 3779: 3767: 3755: 3739: 3726: 3724: 3718: 3717: 3709: 3708: 3701: 3694: 3686: 3677: 3676: 3674: 3673: 3668: 3662: 3659: 3658: 3655: 3654: 3652: 3651: 3646: 3641: 3635: 3633: 3629: 3628: 3626: 3625: 3620: 3615: 3610: 3605: 3600: 3595: 3589: 3587: 3581: 3580: 3577: 3576: 3574: 3573: 3568: 3563: 3557: 3555: 3549: 3548: 3546: 3545: 3544: 3543: 3533: 3528: 3523: 3518: 3513: 3508: 3502: 3496: 3490: 3489: 3487: 3486: 3481: 3476: 3474:United Kingdom 3470: 3468: 3462: 3461: 3459: 3458: 3453: 3448: 3443: 3438: 3433: 3428: 3423: 3418: 3413: 3408: 3403: 3398: 3393: 3388: 3383: 3378: 3373: 3368: 3363: 3358: 3353: 3352: 3351: 3341: 3336: 3331: 3326: 3321: 3316: 3311: 3305: 3303: 3297: 3296: 3294: 3293: 3288: 3283: 3278: 3273: 3268: 3263: 3258: 3253: 3248: 3243: 3238: 3233: 3228: 3223: 3218: 3213: 3208: 3203: 3198: 3193: 3188: 3183: 3178: 3173: 3168: 3162: 3160: 3151: 3145: 3144: 3142: 3141: 3136: 3131: 3126: 3121: 3120: 3119: 3114: 3107: 3102: 3092: 3087: 3085:YAA/Youthforce 3082: 3080:World AIDS Day 3077: 3072: 3067: 3062: 3057: 3052: 3047: 3042: 3037: 3032: 3027: 3022: 3017: 3011: 3009: 3005: 3004: 3002: 3001: 2996: 2991: 2986: 2981: 2976: 2971: 2966: 2961: 2956: 2951: 2946: 2941: 2940: 2939: 2929: 2924: 2919: 2914: 2913: 2912: 2902: 2896: 2894: 2890: 2889: 2887: 2886: 2881: 2876: 2871: 2866: 2864:Berlin Patient 2861: 2856: 2851: 2846: 2845: 2844: 2834: 2828: 2826: 2822: 2821: 2819: 2818: 2813: 2808: 2803: 2798: 2793: 2788: 2783: 2781:Superinfection 2778: 2773: 2768: 2763: 2761:Cardiomyopathy 2758: 2753: 2748: 2743: 2738: 2732: 2730: 2726: 2725: 2723: 2722: 2717: 2716: 2715: 2713:Teens / Adults 2710: 2700: 2699: 2698: 2693: 2688: 2683: 2678: 2673: 2668: 2658: 2657: 2656: 2651: 2646: 2641: 2636: 2631: 2620: 2618: 2614: 2613: 2601: 2600: 2593: 2586: 2578: 2572: 2571: 2566: 2554: 2548: 2537: 2536:External links 2534: 2531: 2530: 2463: 2424: 2401: 2342: 2278: 2229: 2186: 2170: 2140: 2119: 2085: 2033: 1979: 1957: 1914: 1892: 1867: 1852:New York Times 1834: 1805: 1778:(8): 871–872. 1762: 1727: 1670: 1641:(4): 493–498. 1621: 1559: 1530:(3): 448–461. 1510: 1473:(7): 676–688. 1453: 1402: 1397:Be in the KNOW 1384: 1355:(3): 244–254. 1335: 1294: 1273: 1224: 1191: 1140: 1081: 1074: 1043: 1016:(2): 191–196. 1000: 940: 914: 904:. UNAIDS. 2023 886: 837: 800:(3): 249–259. 780: 751:(1): a006841. 728: 718: 717: 715: 712: 711: 710: 705: 700: 695: 690: 685: 678: 675: 661: 658: 638: 635: 626:Main article: 623: 620: 579:Main article: 576: 573: 555:Main article: 552: 549: 545:dead-end hosts 479: 476: 468: 465: 455: 452: 445:viral envelope 439: 436: 407: 406: 403: 400: 397: 394: 391: 388: 385: 381: 378: 375: 371: 334: 331: 327:reading frames 309: 306: 304: 301: 248:sooty mangabey 223: 222: 221: 220: 209: 208: 201: 200: 199: 198: 191: 181: 180: 176: 175: 168: 164: 163: 156: 152: 151: 144: 140: 139: 132: 128: 127: 120: 116: 115: 112:Artverviricota 108: 104: 103: 96: 92: 91: 84: 77: 76: 71: 67: 66: 53: 52: 35: 34: 26: 25: 15: 9: 6: 4: 3: 2: 4093: 4082: 4079: 4077: 4074: 4072: 4069: 4068: 4066: 4051: 4047: 4044: 4042: 4039: 4036: 4032: 4031: 4028: 4025: 4023: 4020: 4017: 4013: 4012: 4009: 4006: 4004: 4001: 3998: 3994: 3993: 3991: 3989: 3983: 3976: 3975: 3970: 3967: 3964: 3963: 3958: 3955: 3951: 3948: 3947: 3946: 3943: 3940: 3939: 3934: 3931: 3929: 3927: 3922: 3920: 3918: 3914: 3910: 3907: 3905: 3902: 3900: 3897: 3895: 3892: 3891: 3889: 3886: 3885: 3880: 3877: 3876: 3874: 3872: 3868: 3862: 3859: 3857: 3854: 3853: 3851: 3849: 3845: 3838: 3837: 3832: 3829: 3828: 3826: 3824: 3820: 3813: 3812: 3807: 3804: 3801: 3800: 3795: 3792: 3789: 3788: 3783: 3780: 3777: 3776: 3771: 3768: 3765: 3764: 3759: 3756: 3753: 3752: 3747: 3743: 3740: 3737: 3736: 3731: 3728: 3727: 3725: 3723: 3719: 3714: 3707: 3702: 3700: 3695: 3693: 3688: 3687: 3684: 3672: 3669: 3667: 3664: 3663: 3660: 3650: 3647: 3645: 3642: 3640: 3637: 3636: 3634: 3630: 3624: 3621: 3619: 3616: 3614: 3611: 3609: 3606: 3604: 3601: 3599: 3596: 3594: 3591: 3590: 3588: 3586: 3585:South America 3582: 3572: 3569: 3567: 3564: 3562: 3559: 3558: 3556: 3554: 3550: 3542: 3541:New York City 3539: 3538: 3537: 3536:United States 3534: 3532: 3529: 3527: 3524: 3522: 3519: 3517: 3514: 3512: 3509: 3507: 3504: 3503: 3500: 3497: 3495: 3494:North America 3491: 3485: 3482: 3480: 3477: 3475: 3472: 3471: 3469: 3467: 3463: 3457: 3454: 3452: 3449: 3447: 3444: 3442: 3439: 3437: 3434: 3432: 3429: 3427: 3424: 3422: 3419: 3417: 3414: 3412: 3409: 3407: 3404: 3402: 3399: 3397: 3394: 3392: 3389: 3387: 3384: 3382: 3379: 3377: 3374: 3372: 3369: 3367: 3364: 3362: 3359: 3357: 3354: 3350: 3347: 3346: 3345: 3342: 3340: 3337: 3335: 3332: 3330: 3327: 3325: 3322: 3320: 3317: 3315: 3312: 3310: 3307: 3306: 3304: 3302: 3298: 3292: 3289: 3287: 3284: 3282: 3279: 3277: 3274: 3272: 3269: 3267: 3264: 3262: 3259: 3257: 3254: 3252: 3249: 3247: 3244: 3242: 3239: 3237: 3234: 3232: 3229: 3227: 3224: 3222: 3219: 3217: 3214: 3212: 3209: 3207: 3204: 3202: 3199: 3197: 3194: 3192: 3189: 3187: 3184: 3182: 3179: 3177: 3174: 3172: 3169: 3167: 3164: 3163: 3161: 3159: 3155: 3152: 3150: 3146: 3140: 3137: 3135: 3132: 3130: 3127: 3125: 3122: 3118: 3115: 3113: 3112: 3108: 3106: 3103: 3101: 3098: 3097: 3096: 3093: 3091: 3088: 3086: 3083: 3081: 3078: 3076: 3073: 3071: 3068: 3066: 3063: 3061: 3058: 3056: 3053: 3051: 3048: 3046: 3043: 3041: 3038: 3036: 3033: 3031: 3028: 3026: 3023: 3021: 3018: 3016: 3013: 3012: 3010: 3006: 3000: 2997: 2995: 2992: 2990: 2987: 2985: 2982: 2980: 2977: 2975: 2972: 2970: 2969:Sex education 2967: 2965: 2962: 2960: 2957: 2955: 2952: 2950: 2947: 2945: 2942: 2938: 2935: 2934: 2933: 2930: 2928: 2925: 2923: 2920: 2918: 2915: 2911: 2908: 2907: 2906: 2903: 2901: 2898: 2897: 2895: 2891: 2885: 2882: 2880: 2877: 2875: 2872: 2870: 2867: 2865: 2862: 2860: 2857: 2855: 2852: 2850: 2847: 2843: 2840: 2839: 2838: 2835: 2833: 2830: 2829: 2827: 2823: 2817: 2814: 2812: 2809: 2807: 2804: 2802: 2799: 2797: 2794: 2792: 2789: 2787: 2784: 2782: 2779: 2777: 2774: 2772: 2769: 2767: 2764: 2762: 2759: 2757: 2754: 2752: 2751:Lipodystrophy 2749: 2747: 2744: 2742: 2739: 2737: 2734: 2733: 2731: 2727: 2721: 2718: 2714: 2711: 2709: 2706: 2705: 2704: 2701: 2697: 2694: 2692: 2689: 2687: 2684: 2682: 2679: 2677: 2674: 2672: 2669: 2667: 2664: 2663: 2662: 2659: 2655: 2652: 2650: 2647: 2645: 2642: 2640: 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Index

Phylogenetic tree of the SIV and HIV viruses
Phylogenetic tree
SIV
HIV
Scientific classification
Edit this classification
Virus
Riboviria
Pararnavirae
Artverviricota
Revtraviricetes
Ortervirales
Retroviridae
Orthoretrovirinae
Lentivirus
Human immunodeficiency virus 1
Human immunodeficiency virus 2
Cladistically
Simian immunodeficiency virus
HIV
epidemiological
West Africa
sooty mangabey
vulnerable
people living with HIV
AIDS pandemic
genetic sequence
virulence
drug resistance
transmissible

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