It's a 'pretty serious' flu season: Dr. Marc Siegel
Fox News senior medical analyst Dr. Marc Siegel joins 'Varney & Co.' to discuss the flu and COVID-19 season as well as a study linking light pollution to Alzheimer's.
Fox News senior medical analyst Dr. Marc Siegel joins 'Varney & Co.' to discuss the flu and COVID-19 season as well as a study linking light pollution to Alzheimer's.