Question

Could vaccinations have stopped the spread of plague in medieval times?​

Answer 1

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Lab trials of this vaccine had a success rate of 80 to 100 per cent. You might think developing a plague vaccine now is too little too late, but having a treatment ready could prevent another widespread outbreak. Plague hasn't been eradicated completely. Up to 3,000 people a year contract it to this day.

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Answer 2

Answer:

A University of Central Florida researcher may have found a defense against the Black Plague, a disease that wiped out a third of Europe's population in the Middle Ages and which government agencies perceive as a terrorist threat today.