Effect of Electronic and Mail Outreach From Primary Care Physicians for COVID-19 Vaccination Among Elderly Patients

These patients were sent two study outreach messages. Study Outreach 1 was an electronic secure message sent on behalf of the PCP, encouraging COVID-19 vaccination and designed based on behavioral science principles. Letters were sent to patients who had not signed up for the electronic health record portal. Study Outreach 2 was a postcard sent to all patients who had not been vaccinated or made an appointment by four weeks after Study Outreach 1.

These patients were sent messages similar to those in Standard PCP Outreach, but with additional culturally tailored content and photos.