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A system of pooled coronavirus tests to catch asymptomatic infections among Duke University students helped keep the campus open in the midst of the pandemic.

Los Angeles County reported nearly 5,000 new coronavirus cases Thursday, the highest single-day count so far. A look at what could be next.

A clinical trial of the coronavirus-fighting ability of face masks had inconclusive results, but researchers say it strengthens the case for universal mask use.

Pfizer has asked the FDA to allow emergency use of its COVID-19 vaccine, which could the bring the first shots as early as next month.

The Arecibo Observatory telescope in Puerto Rico will close, a blow to scientists worldwide who depend on it to search for planets, asteroids and extraterrestrial life.

After previously declining to issue firm guidance for holiday gatherings, the CDC recommends that Americans just stay home this Thanksgiving.

Early research finds that Oxford and AstraZeneca’s COVID-19 vaccine is well-tolerated and produces a strong immune response in people over 70.

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There are still many unknowns when it comes to the pandemic, but the early signs of success for two experimental COVID-19 vaccines make a few things clear.

Cloth mask, surgical mask, N95, bandanna: Rules on face coverings vary widely, and public health experts say standardization is needed to fight COVID-19.

As holidays approach and COVID-19 figures rise, California shows the danger of a lack of discipline and a yearning to get back to normal.

Pfizer announced more results in its ongoing COVID-19 vaccine study, which suggest that the shots are 95% effective, without serious side effects.

U.S. regulators are allowing emergency use of the first rapid coronavirus test that can be performed and developed entirely at home

Two COVID-19 vaccines might be nearing the finish line, but scientists say people still need to volunteer to help finish studying other candidates.

Coronavirus vaccines developed by Moderna and Pfizer show highly promising preliminary results in large-scale clinical testing. But key questions remain.

Health officials are taking a new tack in the COVID-19 fight by emphasizing research that finds a mask protects the person who wears it, not just those nearby.


A daily pill combining four cholesterol and blood pressure drugs taken with low-dose aspirin cut the risk of heart attacks, strokes and deaths by nearly a third.

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