1918-1919 2017h-285 20thcentury brothersandsisters communicablediseases death disease diseases drama dysfunctionalfamilies epidemiology families foote h1n1subtype healthissues history horton human influenza influenzaavirus influenzaepidemic influenzapandemic medical military modern pandemics parents prevention psychologicalaspects soc057000his027090med022000 socialscience unitedstates wc515 worldwari