Table 2.

Caller tunes-based strategies and issues for promoting COVID-19 vaccination.

Strategy	Tactic	Issues to Consider
Songs	•Produce songs on COVID-19 vaccines to be used as caller tunes. •Use popular musicians to release solo songs on COVID-19 vaccines. •Consider having popular musicians come together as a group to produce songs on COVID-19 vaccines to be used as caller tunes. •Use diverse local languages to cater to the needs of illiterate populations.	•Identify artists who address social issues in their music and are active in promoting public causes as has been used in some public health interventions. •Get buy-in of music producers and artist management. •Copyright needs to be discussed and addressed.
Audio messages	•Record COVID-19 vaccine messages from a variety of popular figures, including movie stars, sports celebrities, and religious leaders. •Recruit spokespeople with wide appeal across different characteristics. •Use diverse local languages to cater to the needs of illiterate populations. •Involve advertisement agencies in creating the messages	•Record messages based on initial feedback on COVID-19 vaccine issues most important to priority populations. •Ensure that entertainment does not overshadow COVID-19 messaging. •Work with producers and artists with a history of addressing social issues.