Figure 1. Colorectal cancer incidence (A) and deaths (B) per 100,000 in men in 2005-2009 versus reported cases of poliomyelitis per 100,000population in 1932-1951 by US state (r=−0.311, p=0.032 and r=−0.493, p<0.001, respectively). Polio data from 48 states are included. Hawaiiand Alaska were not states in 1951.