How do I know if my upper respiratory infection is viral or bacterial?

A few warning signs that your cold has progressed from a viral infection to a bacterial infection are:

  1. Symptoms lasting longer than 10–14 days.
  2. A fever higher than 100.4 degrees.
  3. A fever that gets worse a couple of days into the illness, rather than getting better.
  4. White pus-filled spots on the tonsils.

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