DOI:
10.1055/s-00034447
ACI Open
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References
Centers for Disease Control and Prevention.
U.S. Influenza Surveillance System: Purpose and Methods.
Accessed 2020 at:
https://www.cdc.gov/flu/weekly/overview.htm#:~:text=The%20U.S.%20influenza%20surveillance%20system,%2C%20clinics%2C%20and%20emergency%20departments
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