id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-003171-z22ekgtv	Babu, Tara M	Population Serologic Immunity to Human and Avian H2N2 Viruses in the United States and Hong Kong for Pandemic Risk Assessment	2018-10-01		.txt	text/plain	4035	199	52	title: Population Serologic Immunity to Human and Avian H2N2 Viruses in the United States and Hong Kong for Pandemic Risk Assessment METHODS: Hemagglutinin inhibition (HAI) assays against historical human and recent avian influenza A(H2N2) viruses were performed across age groups in Rochester, New York, and Hong Kong, China. In this study, we evaluated population immunity using HAI assays against human and avian H2N2 influenza strains in different age groups in the United States and Hong Kong. The prevalence of titers ≥1:40 against the test viruses is shown for sera from Rochester and Hong Kong in persons born before the 1957 H2N2 pandemic, during the years that H2N2 circulated (1957-1968), or after 1968 is shown in Figure 1 . The comparability of data from 2 geographically separated areas of the world, Rochester and Hong Kong, argues for the representativeness and generalizability of such studies that aim to assess population immunity to viruses of pandemic concern.	./cache/cord-003171-z22ekgtv.txt	./txt/cord-003171-z22ekgtv.txt