Trade union leaders, construction executives and international health care experts are teaming up in Boston o stop the spread of COVID-19 in the city’s booming construction sector. The coalition unveiled a program called Construction Stops COVID on Dec. 22. The testing, tracing and treatment initiative targets tens of thousands of hard-hatted workers toiling on construction sites across the city.

The group includes Greater Building Trades Unions, contractors Suffolk, Turner Construction and John Moriarty & Associates, or JMA, as well as the renowned, international health care organization, Partners in Health, and Harbor Health Services, a local provider.