Moderna Begins Testing Booster Shot Aimed at Omicron
Any Change to Menstrual Cycle After COVID Vaccine Is Minor, Temporary: Studies
Almost 1 in 10 U.S. Lung Transplants Now Due to COVID
Omicron Batters Already Strained U.S. Hospitals
Survivors of Severe COVID Face Higher Odds for Another Hospitalization Soon After
Biden Administration Withdraws Vaccine Mandate for Large Employers
