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A member asked:
I recently had the flu but feel better, have a persistent sore throat due to postnasal drip. noticed i don't have runny nose just postnasal drip. why?
A doctor has provided 1 answer
Fluid in sinuses?: Good morning, when we get flu, the immune system comes to our defense, using our preformed antibodies to fight flu, as well as producing new antibodies to fight the virus. An inflammatory cascade, a chain of events to make the viruses miserable during the process of elimination causes fluid collection inside the sinuses resulting in postnasal drip, drainage of mucus due to gravitational flow.
Answered 8/2/2013
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