NEW YORK -- As Americans brace for the possibility of another difficult winter ahead in the nation's fight against coronavirus, there is a renewed sense of urgency to get as many people inoculated and ...

This story first appeared at ProPublica. ProPublica is a Pulitzer Prize-winning investigative newsroom. Sign up for The Big Story newsletter to receive stories like this one in your inbox. Meggan ...

LAS VEGAS, NEVADA -- A California couple says they were fully vaccinated, but still contracted COVID-19 while on vacation as experts say breakthrough cases are possible, especially with the delta ...

The vaccines also protect against becoming ill from Covid-19, but this protection is not 100%. With the Delta variant, the vaccines may be even less effective against mild disease — though still ...

New research findings provide solid evidence that annual COVID-19 vaccine booster doses continue to be advisable for certain immunocompromised people, researchers at McGill University say. The ...

Recently released data show that females in Idaho reported post-vaccination coronavirus infections at higher rates than females across the country. Nine in 10 of the more than 190 COVID-19 vaccine ...

A small minority of fully vaccinated people living in Minnesota have tested positive for COVID-19, though officials say the “breakthrough” infections are not especially worrisome, reports The Star ...

Measuring a person's immunoglobulin A (IgA) antibody titers after a COVID-19 booster vaccination could reveal who's at greater risk of infection and thus in greater need of revaccination, regardless ...

COVID-19 cases among nursing home residents have been on the rise since July, likely driven by unvaccinated staff members, The New York Times reported Aug. 4. After months of declines, infections ...

Scientists at Tel Aviv University and the Israel Institute for Biological Research have developed the first mRNA vaccine proven completely effective against deadly bacteria. This groundbreaking ...