Ptt 大爆卦 | Hack up a lung - 前往 https://theconversation.com/dry-wet-barking-hacking-a-guide-to-coughs-in-the-time-of-coronavirus-136048

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Dry, wet, barking, hacking: a guide to coughs in the time of ...

A wet cough brings up phlegm from the lower respiratory tract (the lungs and lower airways, as opposed to your nose and throat) into the ...

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