A newer COVID variant called XFG is currently fueling cases of the virus across the country. Nicknamed “ Stratus,” this ...

Children who were vaccinated against Covid-19 last season had a “substantially lower risk” of emergency department and urgent care visits related to the virus, according to a report published Thursday ...

The vaccines were found to decrease the risk of needing medical care in the first six months after vaccination by 76 percent ...

Five years after the start of the pandemic, a group of researchers from Beth Israel Deaconess Medical Center is one step ...

New BIDMC study on COVID-19 reveals persistent immune activation in patients who developed long COVID, which could help identify new paths to treatment.

Long COVID still affects people worldwide with stubborn symptoms like fatigue and cognitive issues. A clinical trial tested ...

Update: This program has ended and free tests are not current available from the government website. The Biden administration has resumed taking orders for free at-home COVID-19 tests as of Sept. 25 ...

If the COVID-19 pandemic has done one thing, it’s made us all more familiar with some of the important players in the immune system. Antibodies, B cells, and T cells are among the best known parts ...

A new study identifies a mechanism for how COVID vaccines may, in infrequent cases, drive heart inflammation, a condition ...