Radiolab: Patient Zero

Around 1908, HIV jumped into the human population. Around 1966, HIV entered into the United States.

• It is thought that HIV originated after a chimp in Cameroon ate two different species of monkey with two xenospecific viruses.  These viruses by chance managed to infect the same cell.  During the duplication process, the enzymes duplicated parts of the two viruses into the same virus.
• Also they explore the origin of the high five
• First they tackle Typhoid Mary