The vaccines were found to decrease the risk of needing medical care in the first six months after vaccination by 76 percent in children under 4, and by 56 percent in children 5 to 17.

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

Five years after the start of the pandemic, a group of researchers from Beth Israel Deaconess Medical Center is one step closer to identifying the cause of the mysterious and debilitating chronic condition known as long COVID — and finding a treatment.

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. The administration is also launching a new infusion of ...

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 of the body’s response to a virus like SARS-CoV-2, but ...

Long COVID still affects people worldwide with stubborn symptoms like fatigue and cognitive issues. A clinical trial tested whether boosting NAD+ using nicotinamide riboside could help. Although overall group differences were limited,

A sweeping new definition of long COVID could help affected people get recognition of their condition and improve diagnosis and treatment. The U.S. National Academies of Sciences, Engineering and Medicine announced the definition for long COVID June 11.

A newer COVID variant called XFG is currently fueling cases of the virus across the country. Nicknamed “ Stratus,” this variant first took hold over the summer and now makes up nearly 70% of COVID-19 cases in the country. As the virus evolves, some signs you’re sick might too. So, what are COVID-19 symptoms in 2025?