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Update: influenza activity--United States and Worldwide, 1990
MMWR. Morbidity and Mortality Weekly Report
|December 14, 1990
Abstract:
Influenza activity in the United States is monitored by CDC through surveillance systems developed in cooperation with state and local health departments; in addition, CDC receives reports of worldwide influenza activity from international World Health Organization (WHO) collaborating laboratories and WHO, Geneva. This report summarizes influenza activity in the United States and worldwide for April through November 1990.