https://www.enr.com/articles/51405-new-covid-19-tests-rules-ramp-up-in-north-america

Covid-19 outbreaks have heavily affected construction sites and projects in North America. In Ontario, they have found that administering rapid tests to workers has been highly beneficial for everyone involved at the sites and has kept many outbreaks from spreading. At some job sites, you need a negative test result to enter, and if any person begins feeling ill, they will have a rapid test administered right then and there. Construction companies need to rely on these tests to keep their employees safe and to continue on with their projects.