Through the engagement and empowerment of 15 trained COVID-19 health ambassadors, the investigators will jointly implement and evaluate a theoretically based and culturally-sensitive socio-behavioral intervention that will: a) reduce mistrust, fatalistic beliefs, and related psychosocial barriers that hinder COVID-19 testing and vaccination; b) increase receptivity and willingness for uptake of COVID-19 testing and vaccination; and c) assess perceived impact of psychosocial and health outcomes related to COVID-19 testing and vaccination for 310 African American and Latinx public housing residents.