The city’s health department cited the widespread use of at-home tests and declining case counts in its decision to eliminate the program.

Contact tracers have struggled for months. Now, they are bracing for a possible unprecedented explosion of cases — and work — during the holiday season.

It’s compatible with D.C.’s exposure notifications system, along with those in nine other jurisdictions.

“It will be visually a lot easier for people to see if a line is decreasing for 14 days based on the daily reported case rate,” D.C. Health Director Dr. LaQuandra Nesbitt said. “As opposed to being able to comprehend those statistical computations.”

A new software built into iPhones allows users to be notified of possible COVID-19 exposures.

Thousands of contact tracers are working in D.C., Maryland, and Virginia. What are they doing, and is it containing the coronavirus pandemic?

A new metric shows that only 2.6% of positive cases in D.C. are from those who are already in quarantine or a close contact of someone who is.

The answer is, predictably, complicated.

Virginia is hiring contact tracers and launching apps to contain the spread of COVID-19. It will give the state a better handle on cases, but could also allow officials to order sick patients to stay home.