<https://hospitalhealthcare.com/covid-19/flu-vaccination-reduces-infection-risk-and-symptom-burden-of-covid-19/#article>
<http://schema.org/headline>
"Flu vaccination reduces infection risk and symptom burden of COVID-19"
<https://hospitalhealthcare.com/covid-19/flu-vaccination-reduces-infection-risk-and-symptom-burden-of-covid-19/>