"Health campaigners" refers to individuals or groups who work actively to promote and improve people's health by advocating for certain health-related issues or causes. Full definition
In a move that has been widely hailed by mental health campaigners, he promised to to introduce NHS waiting time targets for psychological conditions. (politics.co.uk)
And what you'll see when you read the news is that soft drinks have become a soft target for health campaigners. (australianbeverages.org)
We and other health campaigners are not aiming to force women to breastfeed. (babymilkaction.org)