By DONALD G. McNEIL Jr  Health workers in November 2015 with Mibemba Soumah, infected by Ebola, at a treatment center in Conakry, Guinea. CreditSamuel Aranda for The New York Times In a scientific triumph that will change the way the …

Scientists Discovered New Ebola Vaccine That Gives 100 Percent Protection Read more »

Alexandra Sifferlin @acsifferlin Elizabeth Renstrom—TIMEThe region of the Americas is the first in the world to be declared measles-free, after 22 years of work to banish the highly contagious infection that can result in pneumonia, blindness and death (stock photo) …

The first HIV vaccine trial launched in South Africa Read more »

By Julie Steenhuysen Genes taken from archived blood samples show the U.S. AIDS epidemic started in New York in the early 1970s, definitively debunking the long-held belief that the virus was spread in the early 1980s by a flight attendant …

Gene study clears ‘Patient Zero’ as cause of U.S. HIV epidemic Read more »