摘要:In my last post , I profiled the Origins of AIDS , Jacques Pépin’s masterful study of how the virus that causes AIDS in humans originated in chimps and then jumped to humans and later took off as a result of a complex series of events involving local populations uprooted from traditional practices, the spread of prostitution, and widespread use of injections to fight infectious diseases, among other factors (see Donald McNeil’s compact summary review in the Times ).