100-Year-Old Life Hacks That Are Surprisingly Useful Today

100-Year-Old Life Hacks That Are Surprisingly Useful Today
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Many people have a small, round scar on their upper arm, a lasting mark from the smallpox vaccine, which was commonly given before the 1970s. This vaccine used the live Vaccinia virus to create immunity against the deadly Variola virus, the cause of smallpox.

Written by Chris Jorge Avatar

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