Key points are not available for this paper at this time.
Answers are grounded in this paper and cite their sources.
Tom D. Y. Chin, William M. Marine, The Changing Pattern of Poliomyelitis Observed in Two Urban Epidemics: Kansas City and Des Moines, 1959, Public Health Reports (1896-1970), Vol. 76, No. 7 (Jul., 1961), pp. 553-563
No takes yet. Share an insight, caveat, or question.
Chin et al. (1961) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: