Northern Star DeKALB – NIU will continue to require face masks for all individuals, including those who are fully vaccinated, while indoors with few exemptions, according to a May 18 NIU announcement email. The university plans to require face masks for all individuals, even those who are fully vaccinated, on campus in light of the recent Centers for Disease Control and Prevention announcement that lifted indoor mask guidelines for fully vaccinated people. Face masks won’t be required in cases of private offices or personal workspaces on campus, in meetings where all people are fully vaccinated and in research labs where all people are fully vaccinated, according to the email. Supervisors may ask employees to voluntarily disclose their vaccination status or show proof.