Ongoing COVID-19 surge has spread to nearly every neighborhood in Tucson area - Arizona Daily Star

Coronavirus cases are nearly everywhere in Pima County, which has recently set another record for the number of cases in a week.

The Arizona Daily Star mapped and analyzed the locations of COVID-19 cases in Pima County, which were provided by the county, to learn where the virus has spread the most when cases spike.

Since the start of the latest spike to the second week in November, cases have increased in nearly 90% of census tracts countywide.

And nearly half of all census tracts in Pima County have set or matched record weekly case counts during this latest spike.

When cases spiked at the University of Arizona, for example, that surge lasted only about three weeks, from Aug.

It was so concentrated that the census tract with the most cases accounted for 45% of all cases in all tracts in Pima County during these three weeks.

The census tract with the most cases accounted for only 3% of cases in all census tracts countywide.

During the ongoing spike, the census tract with the most cases per 1,000 people in Pima County included a federal prison on South Wilmot Road that had a recent outbreak.

But while the virus has spread more rapidly there, it still only accounted for 5% of cases in all census tracts countywide, from Oct.

Officials ultimately contained the UA spike to a much smaller number than when cases spiked over the summer.

But Pima County has already blown past summer levels in recent weeks.

Meanwhile, the widespread nature of this spike has required Pima County to combat the virus in new ways.