How Long Do Flu Tests Stay Positive After Symptoms Begin?

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Alternative Names

Influenza A; Influenza B


Symptoms

The flu usually begins quickly. The first symptoms are a fever between 102 and 106 F. (An adult usually has a lower fever than a child.)

Other common symptoms include:

  • Body aches
  • Chills
  • Dizziness
  • Flushed face
  • Headache
  • Lack of energy
  • Nausea and vomiting

Between day 2 and day 4 of the illness, the fever and "whole body" symptoms begin to fade.

Then breathing symptoms...

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