Ontario families are required to provide up-to-date vaccination records as children begin schooling. Exemptions are allowed on both medical and nonmedical (religious or philosophical) grounds. In a recent report, Toronto Public Health (2019) called for an end to nonmedical exemptions – a proposal some allege infringes the Canadian Charter of Rights and Freedoms right to freedom of religion and conscience. This paper explores whether and to what extent vaccine refusal is protected under the Charter and argues that the elimination of nonmedical exemptions can be justified under Section 1 of the Charter. The issue of mandatory vaccination may take on special urgency in the coming months and years, if and when a vaccine is found for COVID-19.