immunity

Read more on how boosters work and why they're important.

Is there a difference in effectiveness?

70% of the immune system is located in the gut, where diverse bacteria is best

Ask the Doctors answer their monthly letters column regarding the coronavirus vaccine

Is there a potential dead end for the Covid-19 contagion? Read here.

Dear Doctor: If I received the flu shot in September, am I still protected from the flu in March?   That's a very good question – and the answer depends, in part, on your current health. The flu season normally [...]

Dear Doctors: My daughter had the chicken pox vaccine as a child, so never had chicken pox. She’s now an adult. Should she get a booster? That’s an excellent question. The chicken pox (Varicella) vaccination has been widely used in the [...]