CDC: Fully vaccinated students, teachers can ditch masks; MPS to require MPS to require masks as CDC drops guidance for vaccinated students, teachers Fully vaccinated teachers and students can skip the masks — or so says brand new CDC guidance. They also suggest flexibility for local districts to make their own calls. MILWAUKEE - Fully vaccinated teachers and students can skip the masks — or so says brand new CDC guidance. They also suggest flexibility for local districts to make their own calls. Milwaukee Public Schools will still require them. A Milwaukee Public School spokesman says "while the CDC guidance allows flexibility for local districts to determine masking policies, at this time MPS will continue requiring masks in schools."