Latest data from Northumberland County Council, published by Public Health England, reveals the countywide rate is 309.7 for the week to August 21. There were 992 positive cases over the same period.
However, there are varying rates within the county with parts of the south-east recording higher case numbers.
Here are the 16 areas of Northumberland with the highest rates.
Here are the 16 areas of Northumberland with the highest rates.
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