Older people have been disproportionately affected by the COVID-19 pandemic and are often portrayed as passive victims of this global health crisis. However, older adults do take responsibility for their own health and that of others in large part through social network dynamics. The purpose of this study was to understand the processes whereby older adults’ social networks shape their own health behaviors, and vice versa, in the context of COVID-19 vaccination and other mitigation efforts. Qualitative data from 77 older adults between ages 65 and 94 obtained through focus groups or individual interview participants were analyzed. Participant narratives demonstrated the reciprocal nature of social support and health behaviors and provided evidence that COVID-19-related health behaviors in this population were motivated by social support, altruism, and life experience. These findings emphasize older adults’ active role as health promoters in their families and communities, keeping themselves and their significant others safe from COVID infection. Implications for the role of older adults in community health promotion efforts are discussed.