Huh. I didn't know that people were spraying DDT to combat Polio, even though scientists told them that there was no connection between the disease and flies.
It's also interesting that it was good hygene that helped spread the disease. Before modern plumbing, infants were exposed to a mild dose of the virus and became immune. After, well, there was no real way to get the immunity. Just one more example of why we don't necessarily want a sterile world.
It's also interesting that it was good hygene that helped spread the disease. Before modern plumbing, infants were exposed to a mild dose of the virus and became immune. After, well, there was no real way to get the immunity. Just one more example of why we don't necessarily want a sterile world.
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