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Biology, 22.10.2019 20:00 indikanna

What causes asthma?
a. bacteria that are resistant to antibiotics infect the body.
b. particular antigens trigger muscle contractions that make it difficult to breathe.
c. antibodies and cytotoxic t cells attack cells in the tissues of the lungs.
d. mosquito-borne pathogens enter the bloodstream.

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What causes asthma?
a. bacteria that are resistant to antibiotics infect the body.
b....
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