The Arlington County Jail is reporting its first COVID-19 outbreak. After the first positive test last week, two additional inmates have now tested positive for the virus.

County Sheriff Beth Arthur announced in a press release that the Virginia National Guard will conduct testing of all jail inmates and staff on Thursday and Friday.

“These are the first inmate cases of COVID-19 in Arlington and I want to assure the public we are taking proactive steps to mitigate the spread,” she said. “As cases continue to rise in communities across the country, it is crucial that we continue to work collaboratively and follow public health guidance to help protect individuals and communities from COVID-19.”

All three patients are doing well, and none have been hospitalized, a spokeswoman for the sheriff’s office said.

The spokeswoman could not say if the detention facility would conduct regular surveillance testing — as is required for other congregate living settings like nursing homes — for staff and people incarcerated in the facility after the round of testing the National Guard will conduct this week.

“We are working with public health to determine how we should continue to move forward,” the spokeswoman told DCist/WAMU in an email. The jail has 226 incarcerated people and 280 staff.

The sheriff’s office confirmed the jail’s first positive test of the pandemic last week and said it would conduct contact tracing to identify and test people who had been in close contact with that person. That process led to the other two positive tests.

Arlington County resumed jury trials in November after its plan to do so was approved by the Virginia Supreme Court. The plan says that the court will make “appropriate accommodations” for criminal defendants who have COVID-19 symptoms during their trial, including appearing virtually, granting a continuance to the trial, or declaring a mistrial.

Elsewhere in the region, jails have been hit hard by the coronavirus from the very beginning of the pandemic. Fairfax County Jail had its first positive case in late March. The Prince William County – Manassas Detention Center had a major outbreak — close to 80 cases — among staff and residents this spring, according to the Prince William Times. Earlier this week, the county accepted a $50,000 grant to fight the spread of the virus inside the jail. The D.C. Jail has also been a hotspot, with 200 people testing positive this spring, prompting a judge to order changes to the jail’s response to better protect people incarcerated there.