The Federal Medical Center Rochester staff member who tested positive for COVID-19 has not been at the facility since at least mid-April.

"The staff member left the state of Minnesota in mid-April and has not entered FMC Rochester since returning to Minnesota or testing positive for COVID-19," a FMC Rochester spokeswoman wrote in an email Tuesday morning.

No information was given Tuesday or Monday on the staff member’s role at the prison.

A total of 51 prison facilities and 22 residential re-entry centers are affected nationwide. FMC Rochester is the only federal prison in Minnesota where COVID-19 has been found, according to the Bureau of Prisons.

The bureau has been coordinating COVID-19 efforts since January and has taken actions to limit the spread in facilities and between facilities, according to a spokesman for the Federal Bureau of Prisons in Washington, D.C. Some of those steps include suspending social and legal visits, canceled staff training and travel, limited access for contractors and volunteers, and established enhanced screening for staff and inmates, including temperature checks.

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Movement of the people in the facility is also limited, but the bureau said it is not a lockdown.

Incarcerated individuals who are asymptomatic but have exposure risk factors are quarantined, while those experiencing symptoms with exposure risk factors are isolated and tested for COVID-19, in accordance with local health authority protocols.

Staff, contractors and other visitors to BOP facilities undergo a screening and temperature check by a staff member or contractor wearing appropriate personal protective equipment prior to entering the facility. Staff are also being assigned to the same post and not rotating, as much as possible.

The bureau has 141,310 federal inmates and 10,823 in community-based facilities. The bureau has approximately 36,000 staff.

As of Monday, there were 1,984 federal inmates and 356 staff members who have confirmed positive tests nationwide. Currently, 543 inmates and 149 staff have recovered. There have been 40 federal inmate deaths and zero staff member deaths attributed to COVID-19.