One of the year’s best meteor showers, the Perseid, has begun dazzling stargazers across the U.S.
Vaccines work by tricking the body into thinking it has a virus and mounting a defense against it. That may cause arm soreness, fever, headache, muscle...
Vaccination is likely the best way to prevent COVID-19 in pregnancy, when risks for severe illness and death from the virus are higher than usual.
A fraction of recovered COVID-19 patients are struggling with a long-lasting side effect that prevents them from enjoying common foods.