Spectrum Health workers can use natural immunity as vaccine mandate exemption The exemption, the first for a major health system in #Michigan, was developed "as new research has emerged" on natural immunity. https://www.detroitnews.com/story/news/local/michigan/2021/09/09/spectrum-health-workers-can-use-natural-immunity-vaccine-mandate-exemption/8262491002/ 140 views777, 19:43