Does the influenza vaccine affect the risk of contracting COVID-19?


Danish scientists have published the results of the first study comparing the risk of infection when vaccinated against or against influenza with COVID-19: Some scientists have expressed concern that the influenza vaccine may increase the risk of contracting SARS-CoV-2 or worsen the severity of the disease.
The researchers found that those who were vaccinated against the flu after adjusting for age and the presence of comorbidities had a 0.93-1.01 risk of contracting the coronavirus, compared to unvaccinated participants. The authors concluded that the influenza vaccine did not affect the risk of SARS-CoV-2 infection or the severity of COVID-19 illness.