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Inactivated trivalent influenza vaccination is associated with lower mortality among patients with COVID-19 in Brazil.

Günther FinkNina Orlova-FinkTobias SchindlerSandra GrisiAna Paula S FerrerClaudia DaubenbergerAlexandra Brentani
Published in: BMJ evidence-based medicine (2020)
Patients with COVID-19 with recent inactivated influenza vaccination experience significantly better health outcomes than non-vaccinated patients in Brazil. Beneficial off-target effects of influenza vaccination through trained innate immune responses seem plausible and need to be further explored. Large-scale promotion of influenza vaccines seems advisable, especially in populations at high risk for severe COVID-19 disease progression.
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