DETROIT (AP) — Families of men incarcerated at Michigan’s Kinross Correctional Facility believed its remote location would spare it from a deadly COVID-19 outbreak. For a while, they seemed to be right.

Kinross, built on the grounds of a former Air Force base in the Upper Peninsula, is closer to Canada than it is to Detroit. Unlike most prisons in Michigan, Kinross had remained almost unscathed by the novel coronavirus with only one case between March and October.

But on Oct. 28, corrections officials transferred nine prisoners to Kinross from Marquette Branch Prison, several hours west, where COVID-19 was running rampant. There were 837 confirmed cases by late October, 350 of which were still active when the men were transferred.

Roughly three weeks later, Kinross had its first major outbreak, corrections department data showed. Though agency officials say it’s not because of the transfers, more than 1,100 prisoners have now been infected, at least seven have died and more than 100 guards have fallen ill. The prisoners who came to Kinross had been transferred twice, sent first to Marquette after a riot where they were held, and then had tested positive for COVID-19 there before leaving for Kinross, officials said.

In prisons around the country, COVID-19 outbreaks have followed transfers of prisoners or prison workers. Nearly all of the 25 state prison systems and the federal Bureau of Prisons that responded to a survey conducted by The Marshall Project and The Associated Press said they had reduced or limited the number of prisoners they moved due to the pandemic. Eight states halted the practice except in special circumstances. The reductions were keeping in line with medical guidelines.

But most of those states lifted their restrictions by September and few prison systems heeded the earlier lessons as the pandemic worsened this winter, worrying families of prisoners and correctional officers who work in the prisons.

The coronavirus has killed more than 300,000 people in the U.S., and cases are rising again this

winter after leveling off in the late summer months. There have been more than 275,000 cases inside U.S. prisons. Prisons are a particular concern because social distancing is virtually nonexistent behind bars, prisoners sleep in close quarters and share bathrooms, and each prison has varying policies on personal protective equipment and who gets it.

Michigan had some of the worst and earliest outbreaks of any state prison system. About 20,000 prisoners have contracted the virus since March, and at least 102 have died. Central Michigan Correctional Facility currently has one of the largest outbreaks in the country, with more than 2,000 prisoners testing positive.

State officials said they have followed proper infection-control protocols. Chris Gautz, a spokesman for the Michigan Department of Corrections, acknowledged the transfer of the nine men from Marquette to Kinross on Oct. 28, but insisted that transfers “are not the issue” in the virus surge.

“We’ve looked into that,” Gautz said. “All prisoners who had previously been positive were in a step-down phase, meaning they were no longer contagious. It wasn’t until weeks later when there was a big spike in Kinross.”

But prisoners at Kinross and their families say the virus spiked within roughly three weeks of the transfers, within the window medical experts say the virus remains contagious. Some of the men transferred still had symptoms and were moved into the prison’s general population too quickly, said Matt Tjapkes, who runs a nonprofit dedicated to prisoners’ medical rights in Michigan called Humanity for Prisoners.

“The prisoners feel so helpless because they can’t control it and they can’t stop it,” he said. “They feel like they’re sitting ducks — and they are.”

Corrections officers, too, are worried about the safety of transfers, said Byron Osborn, president of the union that represents most of Michigan’s correctional officers. More than 2,500 correctional staff have contracted the virus in Michigan and at least three have died.

“There is obviously not a lot of definitive information from the communicable disease experts on the spread of the COVID-19 virus or on the topic of when infected people are no longer contagious,” Osborn said. “We believe that everyone would agree that this is problematic.”

Families of the prisoners who’ve fallen ill at Kinross say they’re angry because the movement of prisoners is the one thing the corrections department controls.

Amy Wallace’s husband is one of the men incarcerated at Kinross who caught the virus and recovered. But she said a state prison spokesman recently gave a statement to local media that “pinched a nerve.”

The spokesman said it was difficult to know how COVID arrived at the prison, she recalled.

“Well, OK. We do,” she said.

Michigan state Sen. Ed McBroom, a Republican from the Upper Peninsula, chairs an oversight committee that has held hearings on the corrections department’s response to COVID-19. He said he has no firm knowledge that points to transfers as the culprit in spreading the virus behind bars. But he called the agency opaque and overly positive, and didn’t give it high marks for communication.

“We have to dig in and find out why these outbreaks happen,” he said in an interview. “Were mistakes made? I just don’t know.”

Jennifer Gross thought Kinross’ remote location might keep her fiancé, Robert Vermett, and the other men locked up there safer from the virus, even though she hasn’t been able to visit. Vermett is serving a life sentence for a murder conviction.

Days after the transfers, Vermett told her the virus appeared to have made it inside. He got sick, too and remained seriously ill for more than two weeks.

In an email to her on Nov. 18, shortly before he tested positive, he said: “This WHOLE F—— COMPOUND IS INFECTED. Every unit, the control center, the gym, the school, the chow hall, every where … So why are they moving anybody anywhere?”