What is it about pollen that makes people sick?
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Pollen is tiny pieces of flying dust from plants. When you breathe them inn they get stuck in the lung and airways. For most people this just causes some iritation, sneezing and runny nose. However it is possible that the immune system identifies these pollen as a foreign infection and start actively fighting it. This is known as pollen allergy. In addition to the regular symptoms from pollen this also causes symptoms similar to a cold as the immune system tries to combat what it perceives as an intruder.
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