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Brilliant_brown [7]
3 years ago
15

The belief that children's immune systems need to be exposed to viruses and bacteria in order to strengthen them, but that child

ren are overprotected from this exposure, is called the __________.
Biology
1 answer:
andreev551 [17]3 years ago
4 0

Answer:

hygiene hypothesis

Explanation:

mark brainliest

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