if you could would you?

[Venom]

I'd go back to the middle ages with a vaccine for plague! I'd say I was God in human form and my family would rule the world. How smurfing cool would that be?

dood you know how much vaccine you'd need?
also what if you caught the plague? :O vaccines don't work retroactively!
plus good luck getting people to let you stab them with a needle

People would let doctors cut there arms and drip blood everywhere I dont think a little poke will scare them too less now.