Stock Photo - 21 January 2021, North Rhine-Westphalia, Duesseldorf: Air filter systems are located in the entrance area of the North Rhine-Westphalia state parliament. In the Düsseldorf state parliament, 41 air filter systems are set up for Corona protection. 21 have been ordered by the state parliament administration to be positioned at the visitors' entrance, in elevators and in the lobby, among other places. Photo: David Young/dpa. - Duesseldorf/North Rhine-Westphalia/Germany

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