HAYSLETT, J Endemic influenza. I. Serologic evidence of continuing and subclinical infection in disparate populations in the post-pandemic period. [electronic resource] - The American review of respiratory disease Jan 1962 - 1-8 p. digital Publication Type: Journal Article ISSN: 0003-0805 Standard No.: 10.1164/arrd.1962.85.1.1 doi Subjects--Topical Terms: Asymptomatic InfectionsHumansInfluenza, Human--epidemiologyPandemics