"Warning: Second Wave of Flu Spreading in the US"

The U.S. is experiencing elevated levels of influenza, COVID-19, and RSV, with signs of COVID and RSV infections easing but flu levels picking up again. Experts are uncertain if this indicates a second flu wave, as February is typically an active time for flu. With at least 20 million Americans having had the flu this season, health experts advise it's not too late to get vaccinated. Over half of U.S. adults haven't received the flu shot, with reasons including not feeling the need for it and skepticism about its effectiveness. To stay protected, experts recommend wearing face masks and seeking prompt medical attention if experiencing symptoms.