The Region of Waterloo has issued a notice as thousands of COVID-19 vaccine appointments are available at the Pinebush Road clinic in Cambridge.
The region said most other local clinics are close to capacity this week.
Due to the large amount of vacancies at the Cambridge site, the region has encouraged all eligible residents who have not signed up for a first shot to do so immediately.
Those who pre-register will receive a same-day invitation to book an appointment at the Pinebush location.
Full details can be found by clicking here.