October 1, 2025 – Consent & Vaccinations

“As a matter of law, the mother’s consent is not necessary for the children to be vaccinated if they so choose.

Section 4 of the Health Care Consent Act, 1996, S.O. 1996, c. 2, (HCCA) does not provide any minimum age for capacity to make medical treatment decisions. It provides:

Capacity

4 (1) A person is capable with respect to a treatment, admission to a care facility or a personal assistance service if the person is able to understand the information that is relevant to making a decision about the treatment, admission or personal assistance service, as the case may be, and able to appreciate the reasonably foreseeable consequences of a decision or lack of decision.

Presumption of capacity

(2) A person is presumed to be capable with respect to treatment, admission to a care facility and personal assistance services.

Exception

(3) A person is entitled to rely on the presumption of capacity with respect to another person unless he or she has reasonable grounds to believe that the other person is incapable with respect to the treatment, the admission or the personal assistance service, as the case may be.

Toronto Public Health, citing the HCCA, takes the position that youth age 12-17 do not require their parent or legal guardian’s consent to receive the COVID-19 vaccine if the health care provider administering the vaccine is satisfied that the young person is capable of understanding information about the vaccine, why it is being recommended and what will happen if they accept of refuse the vaccine.

This is consistent with the position taken by the Ontario Ministry of Health. The Ministry of Health’s COVID-19 Vaccine Youth (Age 12-17) Consent Form does not require a parent or legal guardian’s signature or consent (although this option is provided). The Ontario Ministry of Health website states:

COVID-19 vaccines are only provided if informed consent is received from the person to be vaccinated, including those aged 12 to 17, and as long as you have the capacity to make this decision. … Even if you are able to provide informed consent, it would be a good idea to talk about this decision with your parent/guardian or an adult you trust such as your principal or a teacher.

The Court does not, of course, simply defer to the government’s interpretation of the HCCA.

That said, I agree with this interpretation. While medical decision making is an incident of parental custody, if the minor is a “mature minor” and capable of providing informed consent under s. 4 of the HCCA, decisions regarding medical treatment may be made by the minor. As indicated, the question is whether the health are provider administering the vaccine is satisfied that the young person is capable of understanding information about the vaccine.

In Gegus v. Bilodeau, 2020 ONSC 2242, Fowler Byrne J. considered the impact of the HCCA on the parents’ custodial right to consent to medical treatment. She stated, at paras. 48 – 51:

The HCCA requires the consent of a patient to any treatment. There are no age restrictions set forth in the Act. The sole determining factor is whether the party receiving the treatment consents to it…

Accordingly, if the health practitioner believes the child has the capacity to consent to his treatment, they will abide by the child’s wishes. If, on the other hand, the health practitioner determines the child is not capable of consenting, s. 20 [of the HCCA] outlines who may give consent on behalf of the child…

Accordingly, it appears that the HCCA contemplates situations in which only one parent, by court order or separation agreement, has the authority to give consent on behalf of a child when the child is determined to be incapable. The determination of whether only one parent should have this authority is determined under the appropriate legislation, in this case, the Children’s Law Reform Act.

This view of a “mature minor’s” capacity to consent to medical treatment is also consistent with the common law in this area. In A.C. v. Manitoba (Director of Child and Family Services), 2009 SCC 30, Abella J.’s majority decision explained the common law “mature minor” doctrine, at para. 47:

The latitude accorded to adults at common law to decide their own medical treatment had historically narrowed dramatically when applied to children.  However the common law has more recently abandoned the assumption that all minors lack decisional capacity and replaced it with a general recognition that children are entitled to a degree of decision-making autonomy that is reflective of their evolving intelligence and understanding. This is known as the common law “mature minor” doctrine… The doctrine addresses the concern that young people should not automatically be deprived of the right to make decisions affecting their medical treatment.  It provides instead that the right to make those decisions varies in accordance with the young person’s level of maturity, with the degree to which maturity is scrutinized intensifying in accordance with the severity of the potential consequences of the treatment or of its refusal.

While the Ontario legislation does not use the words “mature minor”, s. 4 of the HCCA effectively incorporates certain aspects of this doctrine into the scheme of the Act. The Supreme Court’s decision in A.C. contains a thorough discussion of this doctrine, and the complexity of its application in particular cases.”

            A.C. v. L.L., 2021 ONSC 6530 (CanLII) at 34-42

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