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Preliminary information from various international sources and from the World Health Organization's Influenza Centers indicates that in recent months, moderately distinctive but not altogether new strains of type A influenzavirus have caused outbreaks of illness in Southeast Asia, Australia, and the Far East and a few cases in Hawaii. Cases have been clinically characteristic of influenza.
The newer influenzaviruses are closely related to each other and to strains identified in southern India, July 1971, and in England, January 1972. The prototype antigen in widest use for comparative laboratory tests of current strains is A/England/42/72 (H3N2).
Surveillance will be intensified to
Influenza Vaccine: Supplementary Statement from the Public Health Service Advisory Committee on Immunization Practices. Ann Intern Med. 1973;78:97. doi: https://doi.org/10.7326/0003-4819-78-1-97_1
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Published: Ann Intern Med. 1973;78(1):97.
Infectious Disease, Influenza, Prevention/Screening, Vaccines/Immunization.
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