What are the symptoms of the flu in a child?

The flu is a respiratory disease, but it can affect the whole body. A child can become suddenly ill with any or all of these symptoms:

• Fever, which may be as high as 103°F (39.4°C) to 105°F (40.5°C)
• Body aches, which may be severe
• Headache
• Sore throat
• Cough that gets worse
• Tiredness
• Runny or stuffy nose

In some cases, your child may also have symptoms such as:

• Nausea
• Vomiting
• Diarrhea

Most children recover from the flu within a week. But they may still feel very tired for as long as 3 to 4 weeks.