A, because if you know about hygiene, you can help prevent the flu. Ex: educating younger kids to always wash your hands after touching anything dirty, after using the restroom, and before eating.
No because sometimes they have to put animals down and that’s something I, as a full hearted human, could not do.
Different , symptoms , yep those should work
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no the firemen stopped doing that because thats how diseases are spread so the use this air tube thing, i don't know all the details but im pretty sure you can google it. Hope that helps :)
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