Effect of influenza vaccination on risk of COVID-19

The purpose of this study (https://bit.ly/3rFxs1R) was to assess
if influenza vaccination has an impact on the risk of COVID-19.
A cohort of 46,112 health care workers were tested for antibodies
against SARS-CoV-2 and filled in a survey on COVID-19
symptoms, hospitalization, and influenza vaccination. The RR
of hospitalization due to SARS-CoV-2 for influenza vaccinated
compared with unvaccinated participants was 1.00 for the seasonal
vaccination in 2019/2020 (CI 0.56-1.78, p=1.00). Likewise,
no clinical effect of influenza vaccination on development of
antibodies against SARS-CoV-2 was found. The present findings
indicate that influenza vaccination does not affect the risk of
SARS-CoV-2 infection or COVID-19.