CHICAGO (CBS) — Nearly 500 members of the Chicago Police Department have reported positive COVID-19 test results, according to an internal email obtained by CBS 2.

Of those 491 cases among officers and civilian employees, 490 have been confirmed by the department’s medical section.

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The email also states that all members are required to wear department issued surgical masks and gloves.

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“It is recommended that surgical masks and gloves are to be worn even when inside of a police facility or department vehicle, when 6 feet of social distancing cannot be maintained,” the email stated.

So far, 279 officers have recovered from the disease, and have returned to duty.

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Three police officers have died of COVID-19: Officer Ronald Newman, Sgt. Clifford Martin, and Officer Marco DiFranco.