What were the drivers of influenza decline during the COVID-19 pandemic? medrxivpreprint Sorbonne_Univ_ SARSCoV2 COVID19 Influenza Pandemic
By Neha MathurJul 19 2022Reviewed by Aimee Molineux In a recent study posted to the medRxiv* preprint server, researchers investigated the potential drivers of a global decline in influenza virus circulation during the coronavirus disease 2019 pandemic.
About the study In the present study, researchers used data from the FluNet influenza database to compute influenza change for 166 countries and all 13 weeks-long trimesters between March 2020 and September 2021 relative to a pre-pandemic period between 2014 and 2019. There were 20 trimesters between winter 2014 to 2015 and autumn 2019 and six trimesters between spring 2020 to summer 2021 .
Study findings Related StoriesThe FluNet data showed higher peaks in seasonal influenza cases in northern countries and lower peaks for southern countries during the pre-pandemic period. The authors observed a sharp drop in the percentage of influenza-positive tests during the COVID-19 pandemic period to a minimum of 0.04% during July and August 2020.
The regression tree analyzed data from 93 countries and 330 trimesters. While North America and Europe had a low influenza decline despite strict restrictions during the COVID-19 pandemic in the spring of 2020, tropical countries showed a lesser decrease in influenza cases despite poor pandemic preparedness. In the tropical countries, the COVID-19 case incidence and the strength of COVID-19 response were also lower compared to the European and American nations.
Danmark Seneste Nyt, Danmark Overskrifter
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