Which was the first disease to be controlled by vaccination?

Indigo, yep But some nimrods will refuse it. I can't deal with the anti-vax crowd. smdh

So much amazing information, indeed some great minds, how thought & education can converge to create a better future for many generations to come.

Even 1000yrs before edward jenner , same method is practised in India and Eastern civilizations.

Hemanth Aremanda, was used in African civilizations as well. A slave named Onesimus introduced the idea of inoculation to the US in the early 1700s.