A stunning new study offers early evidence that COVID-19 vaccines might have a secret superpower: a precisely timed mRNA shot could help many cancer patients live longer. The work still requires ...

Covid vaccines may come with a tantalizing benefit that has nothing to do with the virus they’re designed to protect against: boosting the immune system to better fight tumors during cancer treatment.

The FDA has blocked the publication of COVID-19 and shingles vaccine safety studies, drawing concern from public health experts.

Confusion has swirled this fall about who can receive a COVID booster, as federal health officials reworked general recommendations for who should receive the vaccine. At first the Centers for Disease ...