Officials say 660,000 Connecticut residents have signed up to receive alerts when someone they were close to tests positive for COVID-19, but logging a positive case doesn’t happen immediately.

“We’re coming up on about 20% of the entire population of the state has activated this, which gives us more than the critical mass we need for this to be effective from a public health perspective,” Josh Geballe, Gov. Ned Lamont’s chief operating officer, said.

“It depends on how quickly the labs get us the test results. Usually that’s happening quite quickly,” Geballe said.

Geballe said the average turnaround is 24 to 48 hours after the test has been administered. It then goes to the contact tracing database and one of the state’s 750 contact tracers get ahold of the person who tested positive.

Read Christine Stuart’s full report at NBC Connecticut