Influenza got a slow start this year, with just a few cases reported last fall, but over the last few weeks it's picked up speed. Flu is now circulating in all 50 states, and it's widespread in 37. Around 200,000 Americans are hospitalized, and around 37,000 die, as a result of influenza in an average year.
Flu activity will continue into March. Early signs include fever and chills, sore throat and cough, runny or stuffy nose, head and body aches, vomiting, diarrhea and overall fatigue. Tamiflu and other antivirals work best if they're started as soon as possible after the first symptoms appear. And It's still not too late to prevent them altogether, with a quick flu shot.