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MrRissso [65]
3 years ago
15

An infection begins when a pathogen or parasite begins to cause symptoms of a disease.

Biology
1 answer:
MAVERICK [17]3 years ago
5 0
Is this a true or false question?
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<h3>What is life zone concept?</h3>
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Learn more about the life zone with the help of the given link:

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