The U.S. could run into a vaccine supply predicament if an influenza pandemic hits, since only one drugmaker has a U.S. facility with egg-based vaccine production capabilities.
The best way for people to protect themselves from the flu is to get vaccinated -- and it's not too late to get a shot, an infectious diseases expert says.
Flu activity continues to rise across the United States and there's been a slight uptick in the number of deaths in the last week, federal health officials reported Friday.