Sources: State and local health departments
About this Data: New cases and deaths are matched to the date they occurred when possible. Otherwise, they are recorded on the date they are reported by health departments. The seven-day average is the mean number of new cases and deaths for the previous seven days.
County Map of Cases and Deaths in Massachusetts
About this Data: The map shows coronavirus cases and deaths assigned to each county. Population data used for per 100K calculations comes from the U.S. Census Bureau’s 2018 American Community Survey five-year estimates. The calculation for Hot Spots to determine where counties are increasing, decreasing and staying the same is the seven day average over the average of the previous seven days.
Cases and Deaths for All Counties
About this Data: The trend of counties increasing, decreasing or staying roughly the same is based on the seven day average over the average of the previous seven days. Data reflecting change in cases and deaths for hotspots are not shown for counties with fewer than 20 new cases over the past two weeks.
Comparing Cases Added Per Day
About this Data: Scale of the charts for each region selected in the dropdown is adjusted so trends can be compared. Seven day average for areas with fewer than 20 new cases over the past two weeks is not shown.
Counties Where the Virus Is Increasing
Counties Where the Virus Is Decreasing
Counties Where the Virus Is Staying the Same
About this Data: Counties with fewer than 20 new cases over the past two weeks are not shown.