The original schedule had Pfizer doses arriving weekly and Moderna doses coming every three weeks. Starting early in 2021, PHAC’s vaccine rollout webpage outlined the arrival schedule to the end of February, along with planned allotments to the provinces and territories. The data from Jan. 7 was soon replaced with new, lower numbers, as first Pfizer and then Moderna announced problems: Pfizer needed to take its Belgian production facility offline so it could expand it while Moderna was struggling with supply issues. Such problems were always expected as the pharmaceutical industry geared up to produce massive quantities of vaccine, but at a time when every dose is precious, those shortfalls were painfully felt in cancelled appointments and closed vaccination clinics.