RSV, respiratory syncytial virus, usually peaks in December and January while infecting the nose, throat and lungs, usually causing mild, cold-like symptoms, the Centers for Disease Control and Prevention says. Those symptoms make it difficult to distinguish it from the common cold, COVID-19 or influenza.

Lindsey Vonn has “a bad cold or flu” but still plans to compete in her first World Championships race in six years on Thursday. “I wouldn’t let something like that prevent me from racing after everything I’ve gone through to get here!