The Rev. Jesse Jackson, 79, and his wife, Jacqueline, 77, have been hospitalized after testing positive for COVID-19, according to a statement Saturday.

Jesse Jackson, a famed civil rights leader and two-time presidential candidate, is vaccinated against the virus and received his first dose in January during a publicized event as he urged others to receive the inoculation as soon as possible. He and his wife are being treated at Northwestern Memorial Hospital in Chicago.

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“Doctors are currently monitoring the condition of both,” according to the statement from Jesse Jackson’s nonprofit, the Rainbow/PUSH Coalition.

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“There are no further updates at this time,” the statement said. “We will provide updates as they become available.”

A protégé of the Rev. Martin Luther King, Jesse Jackson was key in guiding the modern civil rights movement on numerous issues, including voting rights.

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Despite having been diagnosed for Parkinson’s disease, Jackson has remained active, and has advocated for COVID-19 vaccines for Black people, who lag behind white people in the United States‘ vaccination drive. Earlier this month, he was arrested outside the U.S. Capitol during a demonstration calling for Congress to end the filibuster in order to support voting rights.