OTTAWA—Canada is poised to receive a record number of COVID-19 vaccine doses this week thanks to scheduled deliveries from Pfizer-BioNTech and Moderna, as the country looks to speed up its vaccination efforts. The Public Health Agency of Canada says it expects more than 640,000 shots from the pharmaceutical giants this week, which would represent the largest number of deliveries in a single week. The previous record was set last week when Pfizer and BioNTech delivered more than 400,000 doses of their vaccine following a month-long lull while they expanded a production plant in Europe. The two companies will ship more than 475,000 shots this week before scaling back slightly to 445,000 doses per week as they look to fulfil their commitment to deliver 4 million jabs by the end of March. Canada will also receive 168,000 shots this week from Moderna, which ships its doses every three weeks. Unlike the …