Statuesque satisfying Wallaby

It’s not terribly relevant either way when one considers the plague wouldn’t have wiped out a substantial potion of the worlds population if a vaccine existed and was widely distributed prior to the mass spread of the disease. While one can argue about population control and what silver linings such mass death had for future generations, it sure didn’t make things better for most people at the time, and most people who died likely would not check the “yes” box on a survey which said: “would you want to sacrifice your life as part of a mass culling that will have ancillary positive benefits in the distant future?” So regardless of wether the plague or any illness “cures” itself- an ounce of prevention is worth a pound of cure.

Also it hasn't disappeared.

Also don't insult potatoes

How many times can this be posted

The plague disappeared because they learned to kill the infected fleas which were the vector of the disease and they lived on the rodents. So pest control defeated the plague, not the medical field.