WINNIPEG A group of Winnipeggers who believed they had been given a Moderna COVID-19 vaccine are now finding out they might have been immunized with an AstraZeneca dose by mistake. For her first shot, Terry Rogowsky had received a Pfizer dose but opted to get a Moderna dose for her second shot due to the limited number of Pfizer doses available. That is what brought Rogowsky, her husband, her son and a few of her co-workers to the pop-up clinic at the Weston Memorial Community Centre run by NorWest Co-op Community Health on June 24 – to roll up their sleeves and get a shot of what they were told was the Moderna vaccine.