Directory For a Sex Photos : beeftony: zetsubonna: thank you so fucking much, science side of tumblr One small correction: using cowpox to treat smallpox isn’t vaccination, it’s a similar but distinct process called inoculation. A vaccine uses a weakened, mostly dead form
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» beeftony: zetsubonna: thank you so fucking much, science side of tumblr One small correction: using cowpox to treat smallpox isn’t vaccination, it’s a similar but distinct process called inoculation. A vaccine uses a weakened, mostly dead form
