Dr. Christopher Stellman, Family Medicine, talks about the flu and cold.
What is influenza (flu)?
Influenza (or flu) is a highly contagious viral respiratory tract infection. An estimated 5 to 20 percent of the population in the US contract influenza each year. Influenza is characterized by the abrupt onset of fever, muscle aches, sore throat, and a nonproductive cough.
More about the flu