Journal article

Decreased Influenza Activity During the COVID-19 Pandemic - United States, Australia, Chile, and South Africa, 2020

Sonja J Olsen, Eduardo Azziz-Baumgartner, Alicia P Budd, Lynnette Brammer, Sheena Sullivan, Rodrigo Fasce Pineda, Cheryl Cohen, Alicia M Fry

MMWR : Morbidity & Mortality Weekly Report | CENTERS DISEASE CONTROL & PREVENTION | Published : 2020


After recognition of widespread community transmission of SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19), by mid- to late February 2020, indicators of influenza activity began to decline in the Northern Hemisphere. These changes were attributed to both artifactual changes related to declines in routine health seeking for respiratory illness as well as real changes in influenza virus circulation because of widespread implementation of measures to mitigate transmission of SARS-CoV-2. Data from clinical laboratories in the United States indicated a 61% decrease in the number of specimens submitted (from a median of 49,696 per week during September 29, 2019-February 29, 20..

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University of Melbourne Researchers