COVID-19 vaccine appointments for Ontario kids 5 to 11 can be booked starting Tuesday The province has said it expects to start administering the first shots on Thursday.Health Minister Christine Elliott said 400,000 doses of the pediatric Pfizer-BioNTech vaccine were expected Monday, with more than 600,000 more to come in a later shipment.Children turning five in the remainder of 2021 are also eligible to start booking shots today..