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What do frozen pizza, cookies and ice cream have in common? A new study finds ultra-processed foods make up the majority of U.S. children's and teens' diets.

With COVID-19 vaccine mandates taking effect around the country, requests for religious exemptions are on the rise. Under federal law, employers have a lot of discretion in granting the requests.

Reversing earlier guidance, the agency is encouraging indoor masking for fully vaccinated people under certain circumstances.

Patients with advanced cancer and heart disease are among those who have had to wait for surgeries and other procedures as critically ill, unvaccinated COVID patients strain the medical system.

A Los Angeles judge has rejected a lawsuit to stop the plant’s dismantlement. But the group filing the lawsuit says it’s not over — yet.

Before the pandemic, there was no difference in the rates at which Democratic and Republican voters cast their ballots by mail or in-person. Now, there's a significantly greater preference for mail, or absentee, ballots among Democrats than Republicans.

After vaccination, antibody levels can help predict how much protection a COVID-19 shot offers, scientists are learning. The finding could speed up the development of future vaccines.

People with COVID-19 can infect others even if they are more than 6 feet apart. In updated guidance, the CDC acknowledges airborne transmission can occur, especially in poorly ventilated spaces.

The animals are being launched into the cosmos as NASA researchers attempt to learn more about how the conditions of spaceflight can affect biological organisms and, by extension, future astronauts.

California has denied 21 oil drilling permits in the latest move toward ending fracking in a state that makes millions from the petroleum industry but is seeing widespread drought and more dangerous fire seasons linked to climate change.