The impact of the COVID-19 preventive measures on influenza transmission: molecular and epidemiological evidence

Autor: Leon King Tran, Dai-Wei Huang, Nien-Kung Li, Lucy M. Li, Julia A. Palacios, Hsiao-Han Chang
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: International Journal of Infectious Diseases
International Journal of Infectious Diseases, Vol 116, Iss, Pp 11-13 (2022)
ISSN: 1878-3511
1201-9712
Popis: Objective We quantify the impact of COVID-19-related control measures on the spread of human influenza virus H1N1 and H3N2. Methods We analyzed case numbers to estimate the length of the 2019-2020 influenza season and compare its length to the median of the previous nine seasons. In addition, we used influenza molecular data to compare within-region and between-region genetic diversity and effective population size from 2019 to 2020. Finally, we analyzed personal behavior data, and policy stringency data for each region. Results The 2019-2020 influenza season was shorter than the median of the previous nine seasons in all regions. For H1N1 and H3N2, there was an increase in between-region genetic diversity in almost all pairs of regions between 2019 and 2020. For 10 of 11 regions for H1N1 and 9 of 11 regions for H3N2, there was a decrease in within-region genetic diversity. For 10 of 13 regions for H1N1 and 3 of 7 regions for H3N2, there was a decrease in effective population size. Conclusions We found consistent evidence of decrease in influenza incidence after the introduction of preventive measures due to COVID-19 emergence.
Databáze: OpenAIRE
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