“The admissibility of government recommendations into evidence is not determinative of the best interests of the child. However, it places the onus on the objecting party to show why the child should not be vaccinated: J.N. v. C.G., at para. 45. It remains open to the opposing party to file competing evidence. However, the competing evidence must be admissible. Opinion evidence is not admissible unless the person offering the opinion is qualified as an expert and the opinion relates to a matter within their expertise: see R. v. Mohan, 1994 CanLII 80 (SCC), [1994] 2 S.C.R. 9 at pp. 20-25, see also R v. Sekhon, 2014 SCC 15, [2014] 1 S.C.R. 272 at para. 47. The proposed expert also must also be independent and unbiased: J.N. v. C.G., at paras. 12, 17. While in many cases, it will not be feasible or practical for a party to challenge the efficacy of the vaccine with competing expert evidence, an objecting party may, for example, submit a report from a treating family physician that provides evidence related to the circumstances of an individual child. This could include a child’s particular risk for contracting COVID-19.”