For patients with high-risk CVD, high-dose trivalent inactivated influenza vaccination does not reduce cardiopulmonary hospitalization or all-cause mortality.
Health-care workers who were required by their employers to be vaccinated against influenza and who had the service offered onsite, had near universal coverage levels.
Despite the higher effectiveness of the quadrivalent inactivated influenzavaccine against the added B virus lineage, trivalent inactivated influenzavaccine.