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

Influenza -- Southern Hemisphere, Asia, the Tropics, 1984

Influenza usually occurs from about April through September in the Southern Hemisphere and often occurs throughout the year in the tropics. Surveillance in these regions may, therefore, identify strains that subsequently appear in the Northern Hemisphere.

Thus far in 1984, circulation of influenza types A(H1N1), A(H3N2), and B has been detected, with no clear pattern of large increases in one virus type or subtype compared to the others. Recent isolates have most often been associated with sporadic cases or localized outbreaks. Table 1 illustrates the reported influenza virus isolates in the Southern Hemisphere, the tropics, and Asia from April to July 1984. Reported by Virus Diseases Unit, World Health Organization, Geneva, Switzerland; WHO Collaborating Center for Influenza, Influenza Br, Div of Viral Diseases, Center for Infectious Diseases, CDC.

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