Published on in Vol 5, No 4 (2019): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13403, first published
.
![Differences in Regional Patterns of Influenza Activity Across Surveillance Systems in the United States: Comparative Evaluation Differences in Regional Patterns of Influenza Activity Across Surveillance Systems in the United States: Comparative Evaluation](https://asset.jmir.pub/assets/f6c079a2169f1c129af156928962147e.png 480w,https://asset.jmir.pub/assets/f6c079a2169f1c129af156928962147e.png 960w,https://asset.jmir.pub/assets/f6c079a2169f1c129af156928962147e.png 1920w,https://asset.jmir.pub/assets/f6c079a2169f1c129af156928962147e.png 2500w)
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