Pneumonia starts like this: A bacterial cell called Streptococcus pneumoniae enters the nostril. It travels down the nasal passage and into the lungs, where a war begins. In the lungs, S. pneumoniae encounters immune cells called macrophages, which will do whatever they can to fight it off.
from The Medical News https://ift.tt/2U3Egbo
from The Medical News https://ift.tt/2U3Egbo
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