Add Yahoo as a preferred source to see more of our stories on Google. Spencer Platt/Getty Stock image of a Covid vaccine clinic. Scientists are trying to understand why a small number of people may ...

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 ...

SAN FRANCISCO (KGO) -- Five Bay Area counties say local health providers received COVID-19 vaccine doses from a particular Moderna lot now being paused due to possible allergic reactions. Those ...

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 U.S Centers for Disease Control and Prevention is issuing new allergy guidelines for the COVID-19 vaccine. The recommendations were published on the CDC's website Saturday, CNN reported. If you ...

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 ...

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 42 people who struggled with ...