Community-based participatory research (CBPR) is a systematic investigation that involves collaboration between researchers and community members to address problems and enact social change. The document discusses a case study using CBPR to address high injury and disability rates among hotel room cleaners in San Francisco and Las Vegas. Researchers from the Berkeley School of Public Health and the Labor Occupational Health Program partnered with a hotel labor union and room cleaners. Through focus groups, surveys, and presentations at union meetings, the researchers and cleaners collaboratively gathered and analyzed data on working conditions. This data was then used to influence hotel policies through collective bargaining, enacting social change for marginalized employees. The document argues CBPR was an effective approach here by facilitating