HIV AIDS: Difference between revisions
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[https://www.pbs.org/wgbh/pages/frontline/aids/virus/origins.html by Mary Carmichael FRONTLINE] | [https://www.pbs.org/wgbh/pages/frontline/aids/virus/origins.html by Mary Carmichael FRONTLINE] | ||
As soon as HIV was identified in 1983, scientists started trying to understand where it had come from, when it had arisen, and why it had spread. Were they too late? To answer most of their questions, they would have had to witness the virus's evolution. Scientists can track new pathogens such as SARS and avian flu because they produce obvious symptoms almost immediately. But HIV is a stealth virus that takes as many as 10 years to present symptoms; by the time researchers knew enough to wonder about its origins, those origins were in the distant past. | As soon as HIV was identified in 1983, scientists started trying to understand where it had come from, when it had arisen, and why it had spread. Were they too late? To answer most of their questions, they would have had to witness the virus's evolution. Scientists can track new pathogens such as SARS and avian flu because they produce obvious symptoms almost immediately. But HIV is a stealth virus that takes as many as 10 years to present symptoms; by the time researchers knew enough to wonder about its origins, those origins were in the distant past. | ||
=====History of AIDS===== | |||
[https://www.history.com/articles/history-of-aids by HISTORY 13/7/17] | |||
In the 1980s and early 1990s, the outbreak of HIV and AIDS swept across the United States and rest of the world, though the disease originated decades earlier. Today, more than 70 million people have been infected with HIV and about 35 million have died from AIDS since the start of the pandemic, according to the World Health Organization (WHO). | |||
