Study: NCT04834726

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-In (Call-Back)
Description: Messaging will include a prompt to agree to scheduling. If patient agrees, the access center will call these patients back to schedule, calling up to 3 times.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-In (Call-Back)
Description: Messaging will include a prompt to agree to scheduling. If patient agrees, the access center will call these patients back to schedule, calling up to 3 times.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-In (Call-Back)
Description: Messaging will include a prompt to agree to scheduling. If patient agrees, the access center will call these patients back to schedule, calling up to 3 times.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-In (Call-Back)
Description: Messaging will include a prompt to agree to scheduling. If patient agrees, the access center will call these patients back to schedule, calling up to 3 times.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-in (In-Bound)
Description: Messaging will include a prompt to agree to scheduling followed by a prompt to call the Penn Medicine Vaccine Scheduling Hotline to schedule their vaccine appointment.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-in (In-Bound)
Description: Messaging will include a prompt to agree to scheduling followed by a prompt to call the Penn Medicine Vaccine Scheduling Hotline to schedule their vaccine appointment.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-in (In-Bound)
Description: Messaging will include a prompt to agree to scheduling followed by a prompt to call the Penn Medicine Vaccine Scheduling Hotline to schedule their vaccine appointment.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-in (In-Bound)
Description: Messaging will include a prompt to agree to scheduling followed by a prompt to call the Penn Medicine Vaccine Scheduling Hotline to schedule their vaccine appointment.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Standard Message
Description: The message describes that the patient is eligible for the COVID vaccine.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Standard Message
Description: The message describes that the patient is eligible for the COVID vaccine.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Clinician Endorsement
Description: The message will describe an endorsement from the provider to get the vaccination.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Clinician Endorsement
Description: The message will describe an endorsement from the provider to get the vaccination.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Scarcity
Description: The message will highlight the limited availability and the elevated priority for the patient to receive the vaccine at Penn Medicine.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Scarcity
Description: The message will highlight the limited availability and the elevated priority for the patient to receive the vaccine at Penn Medicine.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-Out Framing
Description: This will highlight that a vaccine is reserved for the patient, implying that they need to opt-out.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Opt-Out Framing
Description: This will highlight that a vaccine is reserved for the patient, implying that they need to opt-out.

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Phone Call
Description: The access center will call these patients to schedule their vaccine appointment. These patients will not receive text messaging.