Who was the first to try vaccination (NOT VACCINE BUT THE SIMILAR METHOD)

Traditional Indian and Chinese medicinal

systems sometimes deliberately rubbed the

skin crusts from smallpox victims into the

the skin of healthy people. They thus hoped to

induce a mild form of smallpox that would

create resistance against the disease.

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clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.