Skip Navigation LinksSkip Navigation Links
Centers for Disease Control and Prevention
Safer Healthier People
Blue White
Blue White
bottom curve
CDC Home Search Health Topics A-Z spacer spacer
Blue curve MMWR spacer

Subtype of Influenza A Isolates -- United States

Influenza A viruses isolated in October from two patients in California and one patient in South Dakota (1) have been confirmed by the WHO Collaborating Center for Influenza, CDC, as subtype (H3N2). Identification of the subtype for two isolates from Wyoming is pending. The cases in California occurred in an 83-year-old woman who had been touring China and the 62-year-old physician who treated her upon her return to the United States.

Colorado has reported its first isolate of influenza A(H3N2), recovered from a specimen collected from a 3-year-old child who became ill in late November. For the week ending November 21, 18 states reported sporadically occurring cases of influenza-like illness. No outbreaks of influenza-like illness have been reported thus far this season. Reported by: Participating State Epidemiologists and Laboratory Directors. Influenza Virus Laboratory, Univ of Colorado Health Science Center, Univ of Colorado, Denver. Div of Field Svcs, Epidemiology Program Office; WHO Collaborating Center for Influenza, Influenza Br, Div of Viral Diseases, Center for Infectious Diseases, CDC.


  1. Centers for Disease Control. Influenza A isolates--United States, 1987. MMWR 1987;36:751.

Disclaimer   All MMWR HTML documents published before January 1993 are electronic conversions from ASCII text into HTML. This conversion may have resulted in character translation or format errors in the HTML version. Users should not rely on this HTML document, but are referred to the original MMWR paper copy for the official text, figures, and tables. An original paper copy of this issue can be obtained from the Superintendent of Documents, U.S. Government Printing Office (GPO), Washington, DC 20402-9371; telephone: (202) 512-1800. Contact GPO for current prices.

**Questions or messages regarding errors in formatting should be addressed to

Page converted: 08/05/98


Safer, Healthier People

Morbidity and Mortality Weekly Report
Centers for Disease Control and Prevention
1600 Clifton Rd, MailStop E-90, Atlanta, GA 30333, U.S.A


Department of Health
and Human Services

This page last reviewed 5/2/01