I am fascinated to find a strong correlation in the literature between maternal influenza during pregnancy especially in the years 1890 through 1930 and incidence of PD in those children (now 65 through 100+ years old). The same literature suggests that the opposite "protective" factor is true in the same cohort if the child had measles (ie., is negatively correlated with PD adult onset). Further input is welcome. What's your experience? PapaBen [log in to unmask]