The agency is replacing its COVID-specific guidance with general guidance for respiratory viruses that says people should stay home when they are sick.

The CDC said Americans 65 and older should get another dose of the updated vaccine that became available in September — if at least four months has passed since their last shot.

The current guidance advises five days of isolation. Unnamed health officials have indicated that this guidance may soon go away, a move that troubles public health experts.

The CDC estimates that up to 86% of new COVID-19 cases stem from the latest mutation. The virus continues to evolve so rapidly that "our immune systems have not been able to keep up," an expert says.

Are we in a surge? How would we know? Is winter now "COVID season?" And what do you do if your whole family got the coronavirus over the holidays? We tackle readers' coronavirus questions.

Infectious disease doctor Abraar Karan says it's the question he's asked most often about SARS-CoV-2. So how does that happen? Here's his answer.

Flu is rising, and COVID levels are higher than last season's peak. But COVID hospitalizations and deaths are down. Nonetheless, COVID is still the most dangerous virus circulating.

Dozens of makeshift centers were built and now stand empty. Now authorities want to revive a stagnating economy and attract young workers to cities by turning the structures into affordable housing.

Starting in early December, about 19,000 school districts will have the chance to order free rapid COVID tests from the federal stockpile for their students, staff and others in the community.

As public health officials gain information about COVID-19 and its effects, they say compelling data show vaccination can help prevent both serious illness and long COVID.

The neurological symptoms of COVID can persist for years after an infection. Scientists are just beginning to understand why.

The study published this month in the journal Cell suggests treating long COVID with antidepressants such as Prozac and other medications classified as selective serotonin reuptake inhibitors (SSRI) may help people recover faster.

Kinks in access to the new COVID-19 vaccine are nationwide. Rural areas will likely feel the brunt.

Hungarian-born biochemist Katalin Karikó and American immunologist Drew Weissman found that a chemical change to genetic code called mRNA eliminated a problematic side effect when used in vaccines.

Kenyan-British artist Michael Armitage painted Curfew after a violent flare-up in Mombasa, Kenya, during the early days of the pandemic. One art critic calls it a "modern masterpiece."