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Research raises questions over delayed second vaccine doses for seniors - CTV News, March 25, 2021
Dr. Timothy Evans, Inaugural Director and Associate Dean at the School of Population and Global Health and Executive Director of Canada's COVID-19 Immunity Task Force Secretariat is among the experts quoted in this piece.
"…Task force director Dr. Tim Evans said the findings underscore a need to monitor senior recipients very carefully after their first shot. "The immune response is so complicated and we still don't fully understand what are called the correlates of protection," Evans said from Montreal, where he is director and associate dean of the school of population and global health at McGill University."