When the virus that causes COVID-19 emerged in 2019, no one had protective immunity. Nearly five years later, most of the United States population has some immunity, either because of vaccination, ...

Vitamin D supplementation does not prevent COVID-19 or improve symptoms but it may help lower the risk of long COVID, a recent study suggests.

A major clinical trial has delivered an unexpected twist in the search for ways to fight COVID-19 and its lingering effects. Researchers at Mass General Brigham found that taking high doses of vitamin ...

GLENOLDEN, Pennsylvania (WPVI) -- Donna Matos heard the news before most people. Since she knows someone who works at the ShopRite on McDade Boulevard in Glenolden, she found out sooner that someone ...

In a large, randomized trial, researchers at Mass General Brigham have found that high-dose vitamin D3 did not reduce COVID-19 infection severity, but may impact long COVID outcomes.

Some COVID-19 patients are testing positive after recovering in Asia, but experts say the presence of antibodies should guarantee short-term immunity ...