Vaccines Are Another Part of Growing Up is a multi-media, multilingual campaign developed by JSI on behalf of the County of Santa Clara Public Health Department. The campaign encourages routine childhood immunization and likens vaccination to important childhood milestones, like a child's first words or first birthday. The campaign's concept, messaging, and visual design were informed by community-based research, including focus groups with members of the priority audiences. Each message was adapted in English, Spanish, and Vietnamese, and distributed through a variety of communication channels including digital and traditional advertising, local outreach events, and a community mural. JSI also distributed campaign-branded educational materials to community members and healthcare providers. JSI's social marketing campaign has helped encourage Santa Clara County residents to ensure their children get vaccinated. Across all media channels, the estimated total reach of Vaccines Are Another Part of Growing Up in Santa Clara County was over 33 million impressions. Between April and July 2023, at least 17,000 unique users visited the campaign landing pages.