Stock image of a Covid vaccine clinic. Scientists are trying to understand why a small number of people may develop adverse reactions to the Covid vaccine. Researchers from Yale analyzed the blood of ...

PHILADELPHIA (WPVI) -- Local medical experts who spend their careers researching viruses and vaccines say we should expect a small number of people to have allergic reactions to the vaccine, but only ...

CHAPEL HILL, N.C. -- As the US Food and Drug Administration considers whether to authorize emergency use of Pfizer and BioNTech's COVID-19 vaccine, medical experts are paying close attention to ...

Simultaneous administration of a COVID-19 mRNA booster shot and the seasonal influenza vaccine slightly increased the risk of systemic reactions during the following week compared with a booster shot ...

LIBERTYVILLE, Ill. -- Advocate Aurora Health, a health care system in Wisconsin and Illinois, said it has resumed COVID-19 vaccinations after temporarily pausing them to investigate "experienced ...

The CDC said 10 cases of confirmed anaphylaxis have occurred in patients shortly after receiving a Moderna COVID-19 vaccine, an average of 2.5 cases of anaphylaxis out of 1 million shots given. The ...

DEAR DR. ROACH: I am a 77-year-old female in good health. I am up to date on all vaccines, but I would like to know why after each COVID shot (about every six months), I have a debilitating reaction ...

To help answer common vaccine questions, we consulted Dr. Stanley Perlman, a professor at the University of Iowa’s Carver ...

Mounting evidence points to a link between new-onset allergies and Long COVID, with mast cell activation syndrome as a ...