Which of the following descriptions about the treatment environment of COVID-19 patients is incorrect?
A、Isolation wards should be divided into three zones, namely clean zone, potential contamination zone and contamination zone.
B、Isolation wards need two channels, namely medical staff channel and patient channel.
C、Fever outpatient does not need to set up three zones and two channels.
D、Each suspected case shall be isolated in a single room, and confirmed cases can be placed in the same room.
E、COVID-19 patients must use the designated controlled channel and elevator when they are sent out for examination.