WMU requires masks to be worn indoors, effective immediately FOX 17 and last updated 2021-08-04 16:49:45-04 KALAMAZOO, Mich. â Western Michigan University students, staff and visitors are all required to wear face masks indoors, the school announced Weâre told the policy takes effect immediately. âThe updated expectations announced today are intended to safeguard all of us in the face of a newly rising case rate locally,â says WMU. âWhen the transmission rate falls to below the âsubstantialâ threshold, our mask requirement will return to our previous policy of requiring masks for students, faculty and staff who have not verified their vaccination status in the Sindecuse Health Center patient portal.â