OTTAWA—The recent flood of COVID-19 vaccine doses into Canada is expected to wane this week, with a little more than 1 million shots scheduled for delivery over the next seven days. Canada has fielded vaccine deliveries from various pharmaceutical firms in recent weeks amid dramatic spikes in COVID-19 case counts across the country. Yet the Public Health Agency of Canada says the only shipment expected this week will come from Pfizer and BioNTech, which have been consistently delivering more than 1 million doses each week since March. While Canada received more than a million combined doses of the Moderna and Oxford-AstraZeneca vaccines last week, the Public Health Agency is not expecting any of either over the next seven days. Moderna, which delivers shots every two weeks, is scheduled to ship more than 1.2 million doses to Canada the week of April 19. Canada has also approved a vaccine produced by …