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Signs and Symptoms

  • Sudden fever or feeling feverish
  • Chills
  • Cough
  • Sore throat
  • Loss of appetite
  • Muscle aches
  • Fatigue
  • Runny nose, sneezing, watery eyes

Flu symptoms usually come on quickly. It is important to go to your doctor if you believe you have the flu.

Warning Signs of Severe Flu in Children: 

Get emergency help if your child shows one or more of these signs:

  • Fast breathing or trouble breathing
  • Skin is bluish or gray
  • Blue or grey lips
  • Not drinking enough fluids, hasn't peed (passed urine) in many hours, or no tears when she cries
  • Lots of vomiting (throwing up)
  • Not waking up, not paying attention to anything
  • Cranky, doesn't want to be held
  • Seizures
  • Symptoms improve but then come back; your child has a fever and a cough that’s getting worse

Warning Signs of Severe Flu in Adults 

Get emergency help right away if you have one or more of these signs:

  • It's hard to breathe, you're short of breath
  • Blue or grey lips
  • Pain or pressure in your chest or stomach
  • Suddenly dizzy
  • Confused
  • Dehydrated, not peeing (no urine)
  • Lots of vomiting (throwing up)
  • Seizures
  • Your flu symptoms improve but then come back; your cough is worse and you have a fever