Recommendations: High-risk Spring 2023 COVID-19 Vaccine Booster Dose Program in OntarioPublished: March 21, 2023 Post author By Public Health Ontario Post date 26 March 2023 ← The Wellness Hub’s Journée bien être → Guidance on an additional COVID-19 booster dose in the spring of 2023 for individuals at high risk of severe illness due to COVID-19