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JAMA. 1998;279:1516-1517.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

MMWR. 1998;47:280-284

3 figures omitted

In COLLABORATION with the World Health Organization (WHO), the WHO international network of collaborating laboratories, and state and local health departments, CDC conducts surveillance to monitor influenza activity and to detect antigenic changes in the circulating strains of influenza viruses. This report summarizes surveillance for influenza in the United States and worldwide during the 1997-98 influenza season and describes the composition of the 1998-99 influenza vaccine.

United States

Influenza activity began to increase in early December 1997 and peaked during late January through early February 1998. The predominant virus was influenza A(H3N2); few influenza type B and influenza A(H1N1) isolates were reported. Each week during the weeks ending January 24 through February 21, 1998, >40 state and territorial epidemiologists reported widespread or regional activity* with peak activity occurring during the week ending February 7.

From September 28, 1997, through March 28, 1998, WHO collaborating laboratories . . . [Full Text of this Article]

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