Recent research and anecdotes suggest people are testing negative on rapid tests even after they have symptoms, then later testing positive. Here's what researchers think is going on.

January is the first month since July 2021 that more than 36 million families in the U.S. did not receive money from the expanded child tax credit program. For some, the consequences are already dire.

The phone number — 1-800-232-0233 — follows the launch earlier this week of a federal website to order the tests.

Georgia recently has set records in numbers of infections reported daily. The current surge, ignited by the Omicron variant, has generated an extraordinary spread of the disease, Dr. Kathleen Toomey, Georgia’s Public Health commissioner, told state lawmakers earlier Thursday. 

The people who take care of and educate children under 5 years old, who are too young to be vaccinated, are in a special kind of hell right now.

Researchers in the U.K. have the first estimates for how long a third shot of the Pfizer vaccine will last. The findings are mixed.