Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Update: Influenza Activity -- United States

Influenza type A(H3N2) virus related to Bangkok/79 has accounted for greater than 90% of all influenza isolates reported during the 1982-1983 season. In recent weeks, increased numbers of type A(H1N1) virus isolates, related to the Brazil component of the current vaccine, have been identified; they have been reported in 11 states, while type A(H3N2) isolates have been reported in 37 states.

Four states (Nebraska, Ohio, Oklahoma, and Texas) reported widespread influenza activity for the week ending February 19. Another 15 states (Colorado, Idaho, Illinois, Iowa, Kansas, Kentucky, Maine, Michigan, Missouri, Montana, Nevada, Tennessee, South Dakota, Virginia, and Wisconsin) reported outbreaks in one or more locations. For the week ending February 19, the observed ratio of pneumonia and influenza (P&I) deaths to total deaths was 5.2, and the expected ratio was 4.1. This is the sixth consecutive week that an excess in the ratio of P&I deaths was recorded from the 121 reporting cities. Reported by Respective state epidemiologists and laboratory directors; U.S. Air Force School of Aerospace Medicine; Div of Surveillance and Epidemiologic Studies, Epidemiology Program Office, WHO Collaborating Center for Influenza, Influenza Br, Div of Viral Diseases, Center for Infectious Diseases, CDC.

Use of trade names and commercial sources is for identification only and does not imply endorsement by the U.S. Department of Health and Human Services.

References to non-CDC sites on the Internet are provided as a service to MMWR readers and do not constitute or imply endorsement of these organizations or their programs by CDC or the U.S. Department of Health and Human Services. CDC is not responsible for the content of pages found at these sites. URL addresses listed in MMWR were current as of the date of publication.

All MMWR HTML versions of articles are electronic conversions from typeset documents. This conversion might result in character translation or format errors in the HTML version. Users are referred to the electronic PDF version ( and/or the original MMWR paper copy for printable versions of 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 The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Road Atlanta, GA 30329-4027, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO
A-Z Index
  1. A
  2. B
  3. C
  4. D
  5. E
  6. F
  7. G
  8. H
  9. I
  10. J
  11. K
  12. L
  13. M
  14. N
  15. O
  16. P
  17. Q
  18. R
  19. S
  20. T
  21. U
  22. V
  23. W
  24. X
  25. Y
  26. Z
  27. #