Question

how many cases of measles were reportes in the united states in 1962 the year before the measles vaccine was licensed how many cases were reported in 5 years later

Answer 1

From 1956 to 1960, an average of 542,000 cases were reported and more than 90% of the population was supposedly infected with it but most of them never reported...

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Answer 2

During 1962, an average of 503,282 measles cases and 432 measles-associated deaths were reported each year