Federal health officials say U.S. adults 65 and older who got a shot of the updated COVID-19 vaccine in the fall should get a booster dose now, if at least four months have passed.
People who have had COVID-19 have a significantly higher risk of suffering chronic fatigue than those who haven't had the disease, a new CDC study shows.
The uptick in illness, documented through wastewater surveillance, coincides with a sharp rise in flu activity during what's proving to be a busy season for respiratory viruses.
The delay in accurate test results is probably a result of people having accumulated immunity from COVID-19 over the years, whether from vaccinations or previous infections.