The type of insurance coverage adults have can affect how, where, and when they receive vaccinations.

According to the study, they defined potential missed opportunities for vaccination as preventive care visits at which patients were eligible for vaccination but did not receive one, and missed encounters as patients who had no preventive care visits during the observation period.

Results showed that most patients with commercial insurance or Medicare received influenza (56.74%), Tdap (51.87%) and HZ (66.78%) vaccinations at preventive care visits, most often from family and internal medicine providers, whereas a large proportion of vaccinations in the Medicaid group occurred during nonpreventive care visits.