TORONTO Now that over half of Torontonians 18 and older have received their first dose of a COVID-19 vaccine, a new urgency lingers the second dose. Vaccine recipients across the country are recommended a second dose within four months of their first, in accordance with the National Advisory Committee on Immunization’s recommendations. But the affirmation of a date and location for a second appointment depends on where you received your first dose. The provincial booking system used for city-run immunization clinics prompts users to book both doses at the same time, a Toronto Public Health spokesperson told CTV News Toronto. They said those who received their first vaccine at a hospital immunization clinic or pharmacy and did not receive a second dose appointment, should contact the respective institution.