I know how we fight germs
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Sam and his mother talk about germs, viruses, and bacteria, including how the body fights harmful germs and uses germs that are helpful.
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Sam and his mother talk about germs, viruses, and bacteria, including how the body fights harmful germs and uses germs that are helpful.
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"Sam and his mother talk about germs, viruses, and bacteria, including how the body fights harmful germs and uses germs that are helpful."
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