Study: NCT05182554

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Doctor Videos
Description: Receive ads on Facebook or through our website with videos in which health professionals tell people to get the Covid-19 vaccine. The health professionals answer common questions about the Covid-19 vaccine, such as how mRNA vaccines work, and what types of side effects to expect.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Doctor Videos
Description: Receive ads on Facebook or through our website with videos in which health professionals tell people to get the Covid-19 vaccine. The health professionals answer common questions about the Covid-19 vaccine, such as how mRNA vaccines work, and what types of side effects to expect.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Sharing Videos
Description: Receive ads on Facebook with videos in which health professionals tell people to encourage their unvaccinated friends to get the Covid-19 vaccine.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Sharing Videos (Influencers)
Description: Receive ads on Facebook with videos in which health professionals tell people to get their most influential friends to encourage their unvaccinated friends to get the Covid-19 vaccine.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Vaccine Ambassador
Description: Adults in participating geographic areas can sign up to be a vaccine ambassador on a website that the study team has built. The study team will send updates to vaccine ambassadors when new content has been posted to the website (e.g. a new video) and/or to remind the vaccine ambassadors to encourage their friends to get vaccinated. The study team will incentivize vaccine ambassadors by entering participating ambassadors into a lottery for a prize.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Vaccine Ambassador
Description: Adults in participating geographic areas can sign up to be a vaccine ambassador on a website that the study team has built. The study team will send updates to vaccine ambassadors when new content has been posted to the website (e.g. a new video) and/or to remind the vaccine ambassadors to encourage their friends to get vaccinated. The study team will incentivize vaccine ambassadors by entering participating ambassadors into a lottery for a prize.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Video framing
Description: The same videos will be displayed using two different frames: a myth frame and a fact frame. Visitors to the vaccine content website will randomly receive one framing of each video.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Video framing
Description: The same videos will be displayed using two different frames: a myth frame and a fact frame. Visitors to the vaccine content website will randomly receive one framing of each video.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Video order
Description: The order in which videos appear on the vaccine content website will be randomized.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Video order
Description: The order in which videos appear on the vaccine content website will be randomized.