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1. Who is at increased risk for flu complications?

Children younger than 5 years old - particularly children younger than 2 years old, adults 65 years of age or older and pregnant women.

Persons with chronic diseases of the lung (including asthma), heart (except hypertension), kidney, liver, blood (including sickle cell disease), brain or nervous system, muscles (particularly those that cause difficulty with swallowing), or metabolism (including diabetes mellitus); immunosuppressant (weakened immune system) including that caused by medications or by HIV.

Persons younger than 19 years of age who are receiving long-term aspirin therapy because of an increased risk for Reye syndrome.

2. What is influenza?

Influenza (also known as the flu) and influenza H1N1 are both influenza viruses that can cause mild to severe illness. Influenza usually comes on suddenly and typically includes fever and cough or sore throat. Other symptoms may include headache, extreme tiredness, runny or stuffy nose, or muscle aches. Nausea, vomiting, and diarrhea are other flu symptoms and are typically more common in children than adults.

3. Does everyone with the flu need to see a health care provider or get tested and treated?

Most children and adults with the flu who are generally in good health will recover without needing to visit a health care provider. Some people may want to call their health care provider for advice on how to care for the flu at home.

4. I think I have the flu. Can I get tested and treatment for H1N1 influenza or seasonal flu?

Testing and treatment is not needed or recommended for most children and adults who get the flu. Antiviral medication is not currently recommended except for people with the flu who are at higher risk for complications (see below) or have severe illness.

5. Who needs to call or visit a health care provider?

Children and adults who are ill and at high risk for flu complications and people with more severe flu symptoms should call their regular health care provider or go to an urgent care clinic or emergency department if they cannot reach their health care provider. Whenever possible, call your health care provider to get advice on whether you need to be seen.

The best use of the emergency department is for individuals with symptoms of serious illness needing urgent attention; or ill individuals who are at increased risk for flu complications, and are unable to contact a health care provider.

6. When should I see a medical provider or go to an emergency room right away?

For children, emergency warning signs that need urgent medical attention include:

• Being so irritable that the child does not want to be held
• Bluish or gray skin color (call 911 immediately)
• Fast breathing or trouble breathing
• Flu-like symptoms improve but then return with fever and worse cough
• Not drinking enough fluids
• Not waking up or not interacting
• Severe or persistent vomiting

For adults, emergency warning signs that need urgent medical attention include:

• Confusion
• Difficulty breathing or shortness of breath
• Flu-like symptoms improve but then return with fever and worse cough
• Pain or pressure in the chest or abdomen
• Severe or persistent vomiting
• Sudden dizziness