About a third of patients confirmed to have COVID-19 report a temporary loss of smell. Yale specialists describe why that might happen, and what can be done.
A dangerous hospital-acquired infection, Clostridium difficile, is now increasing in the community.
She survived a decade of brutal war in China, then came to Yale and helped revolutionize the field of virology
An artist chronicles the time when AIDS was a death sentence
The immune system responds to pathogens by activating T cells, some of which die while others remember the invaders.