Comment: Here is the key part: "3. An implied consent process by which parents are informed of imminent vaccination through social mobilization and communication, sometimes including letters directly addressed to the parents. Subsequently, the physical presence of the child or adolescent, with or without an accompanying parent at the vaccination session, is considered to imply consent. This practice is based on the opt-out principle and parents who do not consent to vaccination are expected implicitly to take steps to ensure that their child or adolescent does not participate in the vaccination session. This may include not letting the child or adolescent attend school on a vaccination day, if vaccine delivery occurs through schools."
Be aware of what your school is doing.