(HealthDay)—Wearing masks in schools appears to sharply curtail the spread of COVID-19, despite the dominance of the highly contagious Delta variant, two new U.S. studies show. Published by the U.S....

While two-thirds of the U.S. adult population has received at least one COVID-19 vaccine dose, vaccination rates remain highly variable across, and within, states. This is of increasing concern as communities...

As states around the country lift COVID-19 restrictions, Oregon is poised to go the opposite direction—and many residents are fuming about it. A top health official is considering indefinitely extending...

Masks reduce the spread of COVID-19. But just how much of an effect do they have? A study co-authored by an MIT professor finds that if the U.S. had introduced a uniform national mask mandate for employees...