Chickenpox used to be a common infection in the United States. For example, in the 1990s, about 4 million people got chickenpox every year, and more than 10,000 people experienced hospitalization. In ...

Dear Dr. Roach: A few months ago, you wrote about the benefits of the shingles vaccine. At 63, I’m one of the 1% who has never had, nor been exposed to, chicken pox. I was tested in 2022 for varicella ...

Last summer, at the Centers for Disease Control and Prevention, an internal presentation on the coronavirus, which was leaked to the press, called the Delta variant of COVID-19 “as transmissible as ...