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Masks May Reduce Viral Dose, Some Experts Say

When, why and how to wear a mask during this pandemic, according to the experts

States with stricter covid-19 restrictions watch lax neighbors warily, knowing the virus does not respect borders

Asked and answered: What readers want to know about coronavirus

Your Coronavirus Antibodies Are Disappearing. Should You Care?

New story in Science and Health from TIME: U.S. Eyes Building Nuclear Power Plants on the Moon, Mars

C.D.C. Calls on Schools to Reopen, Downplaying Health Risks