World / Science & Health May 27, 2021

Immunity to the coronavirus may persist for years, scientists find

The findings may help put to rest lingering fears that protection against the virus will be short-lived.

World May 4, 2021

Reaching ‘herd immunity’ is unlikely in the U.S., experts now believe

New variants and persistent hesitancy about vaccines will keep the goal out of reach. The virus is here to stay, but vaccinating the most vulnerable may be enough to restore normalcy.

World Feb 20, 2021

People who have had COVID-19 should get single vaccine dose, studies suggest

New studies show that one shot of a vaccine can greatly amplify antibody levels in those who have recovered from the coronavirus.

World Jan 26, 2021

As virus grows stealthier, vaccine makers reconsider battle plans

As the coronavirus assumes contagious new forms around the world, two drugmakers reported on Monday that their vaccines, while still effective, offer less protection against one variant and began revising plans to turn back an evolving pathogen that has killed more than 2 million ...

World / Science & Health Jan 21, 2021

Emerging coronavirus variants may pose challenges to vaccines

Experts said it was possible that people who had survived mild infections with the coronavirus may still be vulnerable to infection with a new variant.

World / Science & Health Dec 21, 2020

The coronavirus is mutating. What does that mean for us?

It will be very hard for the coronavirus to escape the body’s defenses, despite the many variations it may adopt.

World Nov 30, 2020

Should isolation periods be shorter for people with COVID-19?

People with COVID-19 are most infectious about two days before symptoms begin and for five days afterward, according to a new analysis of previous research.

World / Science & Health Nov 21, 2020

The coronavirus is airborne indoors, but we’re still scrubbing surfaces

Scientists who initially warned about contaminated surfaces now say here is little to no evidence that deep cleaning mitigates the threat indoors.

World / Science & Health Oct 28, 2020

Some COVID-19 survivors have antibodies that attack the body, not the virus

Some survivors of COVID-19 carry worrying signs that their immune system has turned on the body, reminiscent of potentially debilitating diseases like lupus and rheumatoid arthritis, a new study has found. At some point, the body’s defense system in these patients shifted into attacking itself, ...