You're about as wring as possible and probably have magenta hair. The numbers dropped drastically due to penicillin being discovered and available, and the expansion of fast personal vehicle ownership to allow for quick response times to emergencies.

SIDS didn't exist before childhood vaccinations. Japan stopped vaccinating before 2. They have no sids or autism or chronic allergy issues. The Amish do not vaccinate. They have no sids or autism or chronic allergy issues. In indigenous tribes we see large spikes of these things once vaccination becomes normal. These aren't "ancient numbers" or any other ridiculous response. These are modern today statistics.