(Logarithms make it easier to see growth rates instead of raw numbers. Find out more at A Different Way to Chart the Spread of Coronavirus or How to read a log scale. Note that I'm using log 2 not log 10 as in the NY Times because I'm interested in tracking doubling.

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Massachusetts COVID-19 Data

To see additional current data, go to the Mass. Department of Health website



Massachusetts Known COVID-19 Cases by City/Town as of May 20

Known COVID-19 Rates per 100K April 14 vs May 20

Negative rank change is an improvement compared with rest of state


Massachusetts Known COVID-19 Deaths

Massachusetts Known COVID-19 Cases vs Total Tests

Note: Some private labs were only reporting number of positive results until March 23, so total number of tests before then was higher than reported.


Massachusetts Known COVID-19 Hospitalizations

Massachusetts Known COVID-19 Cases by Age Group

Percent of total cases vs Percent of total population by age


Total number of cases by age group

 
Download data

Most of this data come from the Massachusetts Department of Public Health Web site. You can go there now to see the latest official state dashboard.

Massachusetts changed its data-reporting format on April 20, and I am no longer able to report detailed demographics of fatalities.

As with all U.S. Covid-19 data, these tables and graphs are severely undercounting the actual number of cases. That's due to the woeful inadequacy of testing. Many people who have symptoms still can't be tested, let alone most people who might be carrying the virus but don't have symptoms. Please always keep this in mind when you view this data.

We also didn't know how many tests have been performed in Massachusetts until March 23. Before then, some private laboratories were only reporting positive results. That meant the total number of tests was somewhat higher than being reported.

This application was created by Sharon Machlis with the R programming language and R packages shiny, data.table, ggplot2, plotly, leaflet, DT, and glue, among others. It wouldn't have been possible without the incredible contributions of the R core team and R package authors to make this free platform possible. (Any and all errors in the data presentation are, however, mine alone.)

Infrastructure provided by Digital Ocean.