On March 25, 2024, the Massachusetts Department of Public Health has updated their recommendations, for the general public, to prevent the spread of respiratory viruses (including Flu, COVID-19, RSV). These include staying home until your symptoms are improving and until you have been fever free for at least 24 hours (without the use of fever reducing medications), additional recommendations for the first 5 days after you resume normal activities and what to do if your symptoms return.
The full update and recommendations can be found on Mass.gov: Staying home to prevent the spread of respiratory viruses