This app is still in beta

(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.

Infrastructure provided by Digital Ocean.

Massachusetts COVID-19 Data



Known Cases per 100K Population by County

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 Per 100K

Massachusetts Known COVID-19 Cases by Age Group

Percent of total cases vs Percent of total population by age

Massachusetts Known COVID-19 Deaths

Infrastructure provided by Digital Ocean.

Massachusetts Known COVID-19 Fatalities

Data start March 27



Download data

This app is still in beta. Automated data update is still a work in progress.

Data for this application is downloaded daily from the Massachusetts Department of Public Health Web site. You can see copies of the downloaded PDFs here.

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.