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   How do you know if you have a flu?

   • Common symptoms of the flu often — but not always — include a fever as well as aching muscles, chills and sweats. Other symptoms include: Headache. Dry, persistent cough. Shortness of breath. Tiredness and weakness. Runny or stuffy nose. Sore throat. Eye pain. Vomiting and diarrhea also are flu symptoms.

   Influenza (flu) - Symptoms and causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

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   What are emergency symptoms of the flu?

   • If you have emergency symptoms of the flu, get medical care right away. For adults, emergency symptoms can include: Difficulty breathing or shortness of breath. Chest pain. Ongoing dizziness. Seizures. Worsening of existing medical conditions. Severe weakness or muscle pain.

   Influenza (flu) - Symptoms and causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

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   What happens if you get a flu?

   • Pneumonia or bronchitis. The flu virus can cause damage to your body’s defense system (including the membranes that line your airways and the cilia, which are tiny hairs that help keep the respiratory tract free of mucus). This damage makes patients more susceptible to other bacteria. Asthma flare-ups.

   Influenza (Flu) > Fact Sheets > Yale Medicine

   www.yalemedicine.org/conditions/flu

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2. www.cdc.gov › flu › keyfacts_1Key Facts About Influenza (Flu) | CDC

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   Although people with the flu are most contagious in the first 3-4 days after their illness begins, some otherwise healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick. Some people, especially young children and people with weakened immune systems, might be able to infect ...

3. www.mayoclinic.org › diseases-conditions › fluInfluenza (flu) - Symptoms and causes - Mayo Clinic

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   • Overview
   • Symptoms
   • Causes
   • Risk Factors
   • Complications
   • Prevention

   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 is commonly called the flu, but it's different from the stomach "flu" viruses that cause diarrhea and vomiting. Most people with the flu get better on their own. But sometimes, influenza and it...

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   At first, the flu may seem like a cold with a runny nose, sneezing and sore throat. Colds usually start slowly. But the flu tends to come on quickly. And while a cold can be miserable, you usually feel much worse with the flu. Common symptoms of the flu often — but not always — include a fever as well as aching muscles, chills and sweats. Other sym...

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   Influenza is caused by viruses. These viruses travel through the air in droplets when someone with the infection coughs, sneezes or talks. You can inhale the droplets directly. Or you can pick up the germs from touching an object, such as a computer keyboard, and then touching your eyes, nose or mouth. People with the virus are likely contagious fr...

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   Factors that may raise your risk of getting the flu or its complications include: 1. Age.Seasonal influenza tends to have worse outcomes in young children, especially those age 12 months and younger. Adults older than age 65 also tend to have worse outcomes. 2. Living or working conditions.People who live or work in facilities with many other resid...

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   If you're young and healthy, the flu usually isn't serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects. But children and adults at high risk may develop complications that may include: 1. Pneumonia. 2. Bronchitis. 3. Asthma flare-ups. 4. Heart problems. 5. Ear infections. 6. Acu...

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   The U.S. Centers for Disease Control and Prevention (CDC) recommends annual flu vaccination for everyone age 6 months or older. The flu vaccine can lower your risk of getting the flu. The flu vaccine lowers your risk of having serious illness from the flu and needing to stay in the hospital due to flu. The flu vaccine also lowers your risk of dying...

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4. www.cdc.gov › flu › symptomsFlu Symptoms & Diagnosis | CDC

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   Flu signs and symptoms usually come on suddenly. People who are sick with flu often feel some or all of these symptoms: Fever*/feeling feverish or chills; Cough; Sore throat; Runny or stuffy nose; Muscle or body aches; Headaches; Fatigue (tiredness) Some people may have vomiting and diarrhea, though this is more common in children than adults.

5. www.verywellhealth.com › what-are-the-first-signsWhat Are the First Signs of Flu? - Verywell Health

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   Jan 27, 2023 · When flu symptoms first develop, it may be hard to differentiate them from the early signs of a cold. But, there are a few key ways to tell them apart. Flu viruses almost invariably have a shorter incubation period, meaning that symptoms tend to develop fast and furiously, usually within a day or so.

6. my.clevelandclinic.org › health › diseasesFlu (Influenza): Causes, Symptoms, Types & Treatment

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   Oct 11, 2022 · What are the symptoms of the flu? Symptoms of the flu usually come on quickly, and can include: Fever. Chills. Body aches. Cough. Headache. Sore throat. Runny or stuffy nose . Tiredness or feeling run down. Diarrhea or vomiting (usually only in kids). You may not have all of these symptoms. What causes the flu? The influenza virus causes flu.

7. www.healthline.com › what-to-do-first-signFirst Signs of the Flu: What to Do If You Get Sick - Healthline

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   Nov 19, 2018 · A slight tickle in your throat, body aches, and a sudden fever could be some of the first signs that you’re coming down with the flu. The influenza virus (or flu for short)...

8. www.yalemedicine.org › conditions › fluInfluenza (Flu) > Fact Sheets > Yale Medicine

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   Common symptoms of the flu may include the following: Fever of 100.4 F or higher. Aching muscles, especially in your back, arms, and legs. Chills and sweats. Headache. Cough. Runny or stuffy nose. Sore throat. Fatigue and weakness. At first, it may be hard to distinguish between a common cold and the flu.