This textbook may need some updating in light of 2020. The CDC and the WHO have lost a lot of credibility in the last year.
"Most school and preschools require students to show proof of current immunizations before admission." In Idaho you need to either show immunizations or fill out an Idaho Certificate of Immunization Exemption.
Click here to see the exemption form. I think the Post Falls School District Board of Trustees needs to look into changing this.
Picture of a textbook used in health classes in the Post Falls School District. (Glencoe Health by McGraw Hill)