During 1916 and 1917 there had been a major epidemic in the US; 27,000 cases and 6,000 deaths were recorded, with 9,000 cases in New York City.
1916. ja 1917. aastal oli Ameerika Ühendriikides suur lastehalvatuse epideemia; dokumenteeriti 27 000 haigestumise (neist 9000 New Yorgis) ja 6000 surmajuhtu.