In the first video in our two part series on HIV and AIDS, we explain how scientists figured out what HIV is, when the infection morphs into AIDS, and where they think the virus originated.

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Sources:
https://www.avert.org/professionals/history-hiv-aids/overview
https://aidsinfo.nih.gov/
https://www.hiv.gov/hiv-basics/overview/about-hiv-and-aids/what-are-hiv-and-aids
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3119211/
https://www.hiv.gov/hiv-basics/overview/history/hiv-and-aids-timeline
https://hab.hrsa.gov/livinghistory/issues/Gay-Men.pdf
https://www.cdc.gov/mmwr/preview/mmwrhtml/june_5.htm
http://img.thebody.com/cdc/pdfs/mmwr04jul81.pdf
http://science.sciencemag.org/content/224/4648/500
https://www. hingtonpost.com/news/to-your-health/wp/2015/02/24/tracing-the-long-convoluted-history-of-the-aids-epidemic\
http://www.iflscience.com/health-and-medicine/where-did-hiv-come/
http://www.stat.wisc.edu/~larget/Genetics629/hiv.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3234451/
http://www.who.int/gho/hiv/en/
https://www.cdc.gov/mmwr/preview/mmwrhtml/su6004a11.htm
http://www.aidsmap.com/Saliva/page/1322841/
https://www.ncbi.nlm.nih.gov/pubmed/9989543
http://www.usp.br/nepaidsabia/images/BIBLIOTECA/_MIGRAR/oralhivtrans.pdf
https://www.cdc.gov/mmwr/preview/mmwrhtml/00001257.htm
https://www.nobelprize.org/nobel_prizes/medicine/laureates/2008/press.html
https://www.hiv.lanl.gov/content/sequence/HelpDocs/subtypes-more.html
http://www.the-scientist.com/?articles.view/articleNo/47352/title/HIV-Spread-from-Haiti-to-NYC-in-1970---Patient-Zero--Not-to-Blame/
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0025956
https://retrovirology.biomedcentral.com/articles/10.1186/1742-4690-6-49
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC393899/
http://bedford.io/pdfs/papers/faria-hiv-spread.pdf
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Images:
https://commons.wikimedia.org/wiki/File:Aids_Quilt.jpg
https://commons.wikimedia.org/wiki/File:Hiv_gross.png
https://en.wikipedia.org/wiki/T_cell#/media/File:Healthy_Human_T_Cell.jpg
https://commons.wikimedia.org/wiki/File:Pneumocystisjiroveci.jpg
https://en.wikipedia.org/wiki/Pneumocystis_pneumonia#/media/File:PCPxray.jpg