Vaccination is one of the biggest public health triumphs of our era, the rise of anti-vaxxers in rich countries notwithstanding. Globally, 85 percent of 1-year-olds have been vaccinated — usually for diphtheria, whooping cough, tetanus, polio, measles, and hepatitis B. That’s a huge deal; it has saved millions of lives and been one of the biggest drivers of dramatic reductions in infant mortality over the past 50 years.

Credit CDC

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