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Medicine

Pediatric Vaccination Schedules and Herd Immunity

Quick fact

For measles — one of the most contagious diseases — roughly 95% of a community must be immune to prevent outbreaks. This is why a small drop in vaccination rates can lead to outbreaks even in regions that once eliminated the disease.

Why this is interesting

Almost every parent has followed that long list of childhood vaccines — but have you ever wondered why the shots are spaced out so precisely, or how one child's vaccination can protect their grandparents too?