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Key metrics the state is monitoring for reopening

The Boston skyline.
The Boston skyline.Maddie Meyer/Getty

The state, in its reopening plan, detailed key metrics it is following to determine whether it’s safe to gradually loosen restrictions intended to slow the spread of the deadly coronavirus.

The charts below show the trends in several measures cited by officials as key to moving the state through the multi-phase reopening plan. The officials have warned that if the trends in these charts show the virus spreading again, the state could have to step back a phase, or certain sectors of the economy could be closed.

Note: This page previously showed an infographic with the six key health indicators the state is using to gauge reopening. That graphic has been removed until there is sufficient information about the data that the state is using to update those indicators.

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Note: The state calculates the positivity rate two ways. The first method, which produces one of the key public health indicators above, is to divide the total number of positive tests over a week’s time by the total number of tests administered. The second method is to divide the total number of positive cases by the number of people tested for the first time. The state offers only a daily percentage calculated using the second method in its daily dashboard, but the Globe has been able to calculate the seven-day average from data files provided by the state. The chart below shows the results from the two different methods side by side.


Martin finucane can be reached at martin.finucane@globe.com. Peter Bailey-Wells can be reached at peter.bailey-wells@globe.com. Follow him on Twitter @pbaileywells.