Measles Highly contagious viral illnessHighly contagious viral illness Near universal childhood infection in the pre-vaccine eraNear universal childhood infection in the pre-vaccine era Morbidity and mortality 1950s, United StatesMorbidity and mortality 1950s, United States 450 deaths annually450 deaths annually 48,000 hospitalizations48,000 hospitalizations 4,000 cases encephalitis4,000 cases encephalitis
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