The University of Massachusetts Amherst
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Hampshire County weekly new cases by town/city

I am no longer updating this page. An expanded version is being published every Friday by noon as the Shoestring Covid Tracker.

Total new cases for weeks ending on the dates shown as column headings. These are differences between totals from MassDPH public health reports from one week to the next (the reports came out two days after the dates shown above). Some inaccuracies in weekly totals calculated in this way may occur because of updates in earlier data (see e.g. –1 for Hatfield). Weekly totals per 100K based on populations supplied in the report. Color coding with the CDC categories from the Feb. 12 2021 guidance shown below. “Change” is the current week over the last one; values in red are increases (values greater than 1). “Hampshire” is the total over all the towns and cities except Greenfield and Holyoke, which are included as adjacent large municipalities (in Franklin and Hampden counties respectively). “UMass” shows weekly totals from data downloaded from the UMass Amherst dashboard. These weeks end a day earlier than the dates shown; these were the weeks that aligned best with Amherst in the state data.
The CDC transmission categories from the Feb. 12 2021 school reopening guidance. Positivity rates are not taken into account in the Hampshire County table above, and if they were they could lead to a higher risk categorization, but for at least Amherst, Easthampton and Northampton they would have no effect.

Some of the CDC guidance on school reopening is below. It should be noted that the guidance is controversial; see this New Republic article for an excellent discussion. It is clear, though, that the CDC metric does a better job of separating different degrees of disease spread than the Massachusetts one does, especially in Hampshire County – see this discussion and the Northampton and Amherst graphs here.

Some of the CDC school reopening guidance based on these categories (Table 2 in this document).