insulin
Typhoid fever can spread quickly in areas with contaminated water. true or false?
It can be spread by drinking contaminated water. I don't know if it spreads quickly, but i guess it does so i'd say true. Btw, what's with the question title.. insulin?
Vaccines are usually ineffective against bacteria. true or false?
A vaccine contains a weakened or dead form of the potential microbe so that the body has like a preview of what it looks like. These trigger the immune system to produce antigens against these microbes. So when the real microbes enter the body, the defence is already ready. It works with bacteria too so i'd say false.
Ancient beliefs about the supernatural origin of disease were dispelled during the Middle Ages.
true or false
i think false
Death will most likely occur following exposure to: 100 R's, 200 R's, 500R's?
what is R?
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