Kendal, A P <br/><br/>
Laboratory-based surveillance of influenza virus in the United States during the winter of 1977-1978. I. Periods of prevalence of H1N1 and H3N2 influenza A strains, their relative rates of isolation in different age groups, and detection of antigenic variants.  [electronic resource] 

 -  American journal of epidemiology  Oct 1979 
 - 449-61 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-9262 
<br/><br/><label>Standard No.: </label>10.1093/oxfordjournals.aje.a112826  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Adult<br/>Age Factors<br/>Aged<br/>Antigens, Viral--analysis<br/>Child<br/>Child, Preschool<br/>Disease Outbreaks<br/>Genetic Variation<br/>Humans<br/>Influenza A Virus, H1N1 Subtype<br/>Influenza A Virus, H3N2 Subtype<br/>Influenza A virus--classification<br/>Influenza, Human--epidemiology<br/>Middle Aged<br/>Orthomyxoviridae--classification<br/>United States