The earliest group to implement the IMPROVE intervention ( in 4-9 study months).

Following the wedge 1 group, the wedge 2 group started the intervention in the study months 7-12.

The wedge 3 group started the intervention in the study months 10-15.

IMPROVE is a CBHN-led intervention. The study team delivered comprehensive training to CHNs to let them be well-prepared for intervention delivery. CHNs lead an in-person start-up group education session that consists of 4 modules: 1) a 6-minutes video of a health care provider delivering information on COVID-19 to help participants better understand the disease; 2) using educational slides, CHNs discuss the importance of COVID-19 testing and mitigation adherence; 3) CHNs conduct live demonstration of how to use rapid COVID-19 self-test kit correctly and distribute two COVID-19 self-testing kits to each participant. 4) CHNs guide interactive discussions with participants to enable them to reflect and reinforce what they learned. In addition, CHNs will help participants identify their navigation needs in reducing hesitancy of self-testing and mitigation practices. CHNs will also schedule check-in calls with participants.