Vaccine and Booster Shot Information:
This website link offers a great overview of the current recommendations for the COVID-19 vaccine, including links to all provinces and territories. You can find information about vaccine and booster shot eligibility, making appointments, important considerations for immunocompromised patients, and general information.
The below document released by the Ontario Ministry of Health offers comprehensive information about the initial COVID 19 vaccine series and the rational and recommendations for the COVID-19 Booster shot. There is also an extensive list of immunosuppressive medications that warrant a 3rd dose of whichever vaccine one chooses to get.