2024年9月18日 · Flu symptoms tend to develop one to two days after exposure to the virus and last for five to seven days. Day 1 to day 3 is characterized by the abrupt onset and worsening of symptoms. Day 5 to day 6 is when most people start to feel notably better.

2024年8月3日 · When you get the flu (influenza), it will often start with mild muscle aches, a slight tickle in the throat, or a worn-out feeling you just can't shake. Common wisdom suggests that if you treat flu when symptoms first appear, you may be able to …

2024年9月4日 · Flu symptoms usually start about 2 days after exposure, although this can range from 1 to 4 days. Contagiousness: You’re most contagious 3 to 4 days after your symptoms begin. But you can actually spread the virus anytime from 1 day before symptoms start up to 7 days after you start feeling sick.

Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms begin one to four (typically two) days after exposure to the virus and last for about two to eight days.

2025年1月28日 · Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting. Most people with the flu …

2022年10月11日 · You can be contagious with the flu from a day before your symptoms start to up to a week after. You’re most contagious for three to four days after your symptoms start. People with weakened immune systems and infants may be contagious for longer.

2023年10月11日 · In the U.S., flu season can start as early as October. But sometimes, it doesn’t rear its head until January or February. Infectious disease specialist Kristin Englund, MD, explains how we can ...

2025年2月28日 · Symptoms of influenza usually begin around 2 days after being infected by someone who has the virus. Symptoms include: runny nose. The cough can be severe and can last 2 weeks or more. Most people recover from fever and other symptoms within a week without requiring medical attention.

2024年10月28日 · Learn about the flu season, including how CDC track flu activity and when flu activity occurs and most often peaks.

Influenza (flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. Learn about flu, including symptoms, prevention methods, and treatment options.