Reopening Data Dashboard

CPS’s scientific experts have developed the following metrics specifically designed to inform CPS’s Back-to-School Reopening Plan, which prioritizes in-person learning based on needs (including young age, disability, and English language learning) and requires strict safety procedures including availability of high-quality masks, appropriate ventilation and surveillance viral testing.

CPS and its scientific advisors will revisit the metrics and latest data to inform any decision to significantly increase in-person attendance.

For each metric below:

  • Definition
  • Threshold
  • Current Status

If any metric surpasses recommended thresholds it will be displayed as orange. If two or more metrics exceed thresholds, metrics will be displayed as red and learning will shift to remote only.

New Cases

Definition: Weighted average of new cases
per day, per 100,000 people

Threshold:
Fewer than 25 new cases per day, per 100,000 people (7-day average)

6.4 new cases per day (As of 09/20/2020)

Testing Rate

Definition: Rate of positive COVID-19
tests in Massachusetts

Threshold: Less than 5% of COVID-19 tests are positive

0.8% (As of 09/20/2020)

Wastewater Monitoring

Definition: The level of COVID-19 found
in sewage wastewater

Threshold: COVID-19 in wastewater detected at < 100 copies viral genomes/mL

44 (As of 09/17/2020)


Details
Metric 1: Fewer than 25 new cases per day, per 100,000 people (7-day average)

Details: Weighted average of new cases per day, per 100,000 people, reported for Suffolk County (33%) and Middlesex County (67%)

Explanation:
Looking at a rolling average is more accurate than any 1 day, because delays between testing and reporting may occur (for instance over weekends). The “per 100,000” standard is commonly used and allows us to compare groups. This figure is also used because infections occur in pockets, so it’s important to look at large enough groups to ensure we haven’t missed anyone.

Source: Pandemics Explained

Metric 2: Less than 5% of COVID-19 tests are positive

Details: The rate of positive COVID-19 tests in Massachusetts

Explanation:

As the incidence of COVID-19 goes up in a community, the rate of positive tests will go up. If the rate of positive tests gets too high, this may indicate that not enough testing is taking place. That is, if testing capacity is not keeping up with demand, cases may go undetected. Indicator 2 therefore underscores the accuracy of indicator 1. Since COVID-19 does not confine itself by geographic boundaries, looking at a statewide metric helps to ensure we understand what is happening across Greater Boston and beyond.

Source: Mass.gov: COVID 19 Response Reporting

Metric 3: COVID-19 in wastewater detected at < 100 copies viral genomes/mL

Details:
CPS will monitor the level of COVID-19 found in sewage wastewater

Explanation:
MWRA serves 61 communities in the Greater Boston area. Three samples are collected at the Deer Island treatment plant for laboratory testing, looking for genetic material from the virus that is excreted in feces.

While this method for measuring prevalence is still being studied, it provides a more comprehensive view of prevalence because sewage represents samples from every resident.

Source: MWRA

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