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The flu is a very common but potentially serious illness caused by influenza viruses that infect the nose, throat and sometimes the lungs. As many as 45 million Americans can get the virus each year,\xa0 but even people who are vaccinated could still get the flu. Dr. CASEY LAFFERTY, Medical Director at Health First joins me to talk about\xa0 what to do if you get it,\xa0 how to protect yourself and your family and about a new preventive option people 12 years of age and older can take if they come into contact with someone who has the flu.