Current seasonal flu activity in the United States, information for health providers, in season estimates, and FluSight forecasting. A Another factor that may contribute to influenza peaking in the winter could be the fact that people spend more time indoors. Symptoms of influenza include: 2  Fever Body aches Cough Headache Chills Exhaustion and fatigue Congestion Vomiting and diarrhea (in some people, typically children) Additionally, lower levels of vitamin D due to less exposure to sunlight could possibly contribute to an increased susceptibility to infection.When you have the flu, symptoms typically come on suddenly. Overall, the CDC estimates that 12,000 and 61,000 deaths annually since 2010 can be blamed on the flu. Healthline Media does not provide medical advice, diagnosis, or treatment. What People with a Staph Infection Should Know about Flu; All data are preliminary and may change as more reports are received.Frequently asked question and answers for the 2020-21 influenza season.Find current information on the 2019-20 flu season.​This web page provides preliminary cumulative estimates of flu cases, medical visits and hospitalizations for the 2019-2020 season.

Join the Fight Against Flu! During this time, the virus may be more stable. Despite the seasonality of influenza activity, many people experience flu-like symptoms during the summer. ... Find current information on the 2019-20 flu season. Common symptoms between gastroenteritis and flu include fever, headache, and body aches and pains.In contrast to the flu, the symptoms of gastroenteritis are more focused around your gastrointestinal tract and may include watery diarrhea and abdominal cramps.The common initial symptoms can be very similar to those of the flu and can include fever, chills, and headache.Symptoms to look out for that can point specifically to pneumonia include cough with green or yellow mucus, shortness of breath, and sharp chest pain.Overlapping symptoms between the two conditions include cough, fever, chills, and fatigue or malaise.Similarly to pneumonia, symptoms to look out for that may indicate bronchitis include a cough with mucus, shortness of breath, and discomfort in your chest.Unlike the flu, symptoms are focused on your gastrointestinal tract and include nausea and vomiting, diarrhea, abdominal pain, and fever.You may notice symptoms shortly after consuming contaminated food, although they may also take days or weeks to appear.Most people with Lyme disease also have a characteristic bull’s-eye rash at the site of the tick bite. A weekly influenza surveillance report prepared by the Influenza Division. However, the rash doesn’t occur in all people.You should see your doctor for your flu-like symptoms if you’re experiencing any of the following:You should also seek immediate medical treatment if you’re Although the influenza virus can circulate throughout the year, it’s most common during the winter months. This makes them more likely to share an enclosed space with infected individuals. Although the Flu season is when influenza activity is highest. They can include: fever chills coughing or sneezing headache body aches and pains runny or congested nose sore throat fatigue Final estimates will be provided later this winter.The Influenza Division at CDC has engaged with members of the scientific community on real-world influenza forecasting challenges known as FluSight.To receive weekly email updates about Seasonal Flu, enter your email address:Centers for Disease Control and Prevention. Our website services, content, and products are for informational purposes only. Everyone 6 months and older needs a flu vaccine each year.

This year’s flu vaccine has been 45% effective against the flu so far this season, new CDC figures show..

Flu Symptoms & Complications plus icon. "A steep increase in volume starting in August 2019" was detected at Wuhan hospital parking lots, "culminating with a peak in December 2019," the authors wrote. Adults with seasonal flu don’t usually have stomach problems like vomiting or diarrhea, but children sometimes do. The incidence of influenza infection typically begins to increase in October and peaks in the winter months of December, January, or February.It’s believed that the seasonal nature of influenza may be due to the colder, drier climate that’s present during the winter months. Saving Lives, Protecting People If you’re experiencing flu-like symptoms during the warmer months of the year, they may be due to another illness or condition other than the flu.Some possible illnesses that may give you flu-like symptoms in the summertime include:However, unlike the flu, the symptoms of the common cold develop gradually and are most often less severe. If you’re experiencing flu-like symptoms during the summer months, it’s unlikely that you have the flu.The best way to prevent getting sick over the summer months is to practice good health habits. They can include:The symptoms of flu are also common symptoms of other illnesses. Information on how these estimates are calculated can be found on CDC’s web page How …

Editor's note: This story was most recently updated Feb. 21, 2020.