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The entrance to the Kettle Moraine Correctional Institution as seen, Thursday, October 1, 2020, near Glenbeulah, Wis. (Photo: Gary C. Klein/USA TODAY NETWORK-Wisconsin)

SHEBOYGAN – With two in five inmates at the Kettle Moraine Correctional Institution infected with COVID-19 in the state’s largest prison outbreak, officials can no longer isolate the sick from the uninfected.

Devante Welch, who is among those who tested positive, says it’s “a whole new environment.” The medium-security prison now feels like a maximum-security one.

The prison is locked down, limiting the movement of inmates. They access certain parts of the prison on rotating schedules, but for the most part are quarantined in their cells with their cellmates.

More than 600 inmates have tested positive at KMCI since early September — or over half of the prison’s 1,100 population. As of Thursday afternoon, nearly 450 cases were still active.

Welch, who had a