A guide to testing, quarantining, isolating and returning to work or school, depending on whether you’ve gotten vaccinated fully, part

The deadly third wave of the 1918 flu shows what can happen when society prematurely returns to pre-pandemic life, a medical historian cautions.

An emergency medicine physician offers tips to slow the spread of COVID-19 and limit hospitalizations.

Swollen lymph nodes, a possible side effect of the vaccine, could raise unnece

Nearly every state has reported cases of a rare, but potentially life-threatening, COVID-related inflammatory illness affecting childr