COVID-19 immunization is voluntary for Alberta Health Services staff, but health-care experts say it could reignite debate over mandating vaccinations among medical professionals. AHS confirmed Thursday that staff will not be required to immunize. “However, it is important that our health-care workers get immunized to protect themselves and our patients against COVID-19,” AHS said in a statement. “If you have, say, four per cent who refuse, it could be that the health-care system could operate by redeploying those four per cent to areas where they’re not going to infect patients,” Guichon said. “But if you have 70 per cent who refuse to vaccinate, and in the midst of a pandemic, then it will probably be mandatory.