Herd immunity is important because it defines when a whole community is protected. That includes people who haven't caught the disease, people who had the illness and recovered, and people who got a ...

The concept of vaccination was first developed in the 19th century when Dr. Edward Jenner made the observation that milkmaids ...

Two separate studies, in Kenya and Uganda, have offered clues on how malaria immunity is obtained and how long it lasts. The work reveals for the first time the role of a subset of natural killer ...