A member asked:

Does green nasal discharge and cough without fever mean infection on child?

A doctor has provided 1 answer

Not necessarily: Nasal mucous is composed of water, protein and sugar which support bacterial growth. Experiments using small thimble like containers of mucous have been photographed over several hours and show the gradual coloring of the material by airborne germs. The more time passed, the deeper the color. All mucous exposed to open nasal surfaces are likely to color over time.

Answered 4/15/2015

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