"Co‐infection of otherwise sublethal doses of a Nicaraguan clinical H1N1 isolate and two days later with a virulent DENV2 strain increased systemic DENV titers and caused 90% lethality. "
Influenza and dengue virus co‐infection impairs monocyte recruitment to the lung, increases dengue virus titers, and exacerbates pneumonia
https://onlinelibrary.wiley.com/doi/full/10.1002/eji.201646675

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"Penguins have US bird flu genes now"
https://wwwnc.cdc.gov/eid/article/22/12/16-1076_article