ANN ARBOR, Mich. – Michigan Medicine plans to have 55 frontline workers receive the COVID-19 vaccine on Tuesday. Tom Mann, the director of occupational health at the University of Michigan Hospital, described what needs to be done to get the vaccine to these workers. The “reconstitution process” means mixing the vaccine with saline to prepare it for the patient. First doses arrived MondayThe first doses from Pfizer came rolling into Michigan Medicine on Monday morning. University of Michigan Health System President Dr. David Spahlinger said he got word over the weekend that the vaccines were ready and being shipped.