19 to Zero is a not-for-profit science communications initiative based in Calgary, Alberta. Hosted at the University of Calgary, the public–private partnership is made up of around 500 members including public health specialists, academics, behavioural psychologists, marketers and multimedia creators. Its purpose is to increase confidence in vaccines for COVID-19 and other diseases by tackling vaccine hesitancy. The group publishes materials on its website and through partner organizations, including videos, billboards, presentations, brochures and in-person events.