Scarlet fever is a completely different matzav.
Baruch Hashem, we now have antibiotics and penicillin.
In around 1925, my grandfather’s brother and sister died of scarlet fever. His other brother then developed life-threatening complications that are still a problem to this day.
In 2008, my little brother had scarlet fever. He was on antibiotics for ten days, was up and feeling fine in three.
Modern medicine is truly one of the niflaos haBorei.
There is no such medication for measles, mumps, etc. They’re viruses- you take two Advil and hope for the best. As soon as you draw comparisons like that you lose your credibility.
Nobody’s inventing fatality statistics- go look up the polio pandemic in the forties and fifties. And vaccines work- polio is now virtually eradicated from the US. Doctors aren’t even taught to recognize the symptoms of diphtheria anymore, it’s so rare now that there’s a vaccine.