REGINA -- Saskatchewan made some changes to its age-based COVID-19 vaccine strategy Monday, announcing it will begin immunizing some frontline essential workers – but not all. The province reported it will begin vaccinating police officers, firefighters and public health inspectors with the help of mobile vaccination clinics. Remaining health care workers will also receive first doses and pharmacies will be able to vaccinate its own employees in the coming weeks. The Ministry of Health said vaccination of first responders will start in the next two weeks, as mobile vaccine clinics finish giving first doses to residents and staff in congregate living settings.