The U.K. has approved Pfizer's COVID-19 for emergency use, but how long will it be before Health Canada approves a vaccine, and who gets it first? Matt Galloway is joined by Dr. Caroline Quach, chair of the national advisory committee on immunization; Dr. Supriya Sharma, chief medical advisor to Health Canada's deputy minister; and Dr. Scott Halperin, director of the Canadian Centre for Vaccinology.