Early findings on immune escape and transmissibility, combined with danger posed by Delta, heighten urgency of vaccination, testing, other safety measures.

As governments and health officials navigate pandemic, researchers stress the danger that comes with bad information.

Epidemiologist William Hanage predicts likely decline in U.S. COVID cases, epending on vaccination rates, control tactics, and the absence of variants.

Ofer Levy, who directs Boston Children’s Hospital’s Precision Vaccines Program, discussed the news that the Pfizer-BioNTech vaccine has been shown to be safe in school-age children, a potentially key development in the fight to bring the coronavirus pandemic under control.

Massachusetts General Hospital study links healthy plant-based foods with lower risks of getting of COVID-19 and of having severe disease after infection.

Despite its ability to transmit more easily and puncture vaccine defenses, the delta variant is no superbug. It is vulnerable to masking, distancing, and other non-pharmaceutical interventions, lessons from delta outbreaks overseas show.

Harvard Associate Professor of Epidemiology William Hanage provides tips on how to deal with the Delta variant of COVID-19.

Robert Blendon examined the divide among Americans over vaccine mandates.

Coronavirus ultimately not over, says Harvard Chan School's William Hanage.