A useful metric, especially in light of the incoming Anti-science/anti-reality administration. The thing to keep in mind - science doesn't care if you believe or not. If you jump off a tall building, you will not suddenly be able to fly. You will just be a pancake when you reach the bottom.
Reposted from Mikel Jollett
Annual morbidity in the 20th century, before and after vaccines:

Measles:
Before: 530,000, After: 47

Mumps:
Before: 160,000, After: 429

Rubella:
Before: 50,000, After: 3

Diphtheria:
Before: 20,000, After: 2

Smallpox:
Before: 30,000, After: 0

Polio:
Before: 16,000, After: 0

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