Wyo. Stat. § 21-4-309: Mandatory immunizations for children attending schools; exceptions.

(a) Any person attending, full or part time, any public or

private school, kindergarten through twelfth grade, shall within

thirty (30) days after the date of school entry, provide to the

appropriate school official written documentary proof of

immunization. For purposes of this section, documentary proof

of immunization is written certification by a private licensed

physician or his representative or by any public health

authority, that the person is fully immunized. Documentation

shall include month, day and year of each required immunization

received against vaccine preventable disease as designated by

the state health authority. No school administrator shall

permit a student to attend school for more than thirty (30)

calendar days without documentary proof of immunization. If

immunization requires a series of immunizations over a period of

more than thirty (30) calendar days, the child shall be

permitted to attend school while receiving continuing

immunization if the school administrator receives written

notification by a private licensed physician or his

representative or by a public health official, specifying a

written schedule for necessary immunization completion within

the medically accepted time period. Waivers shall be authorized

by the state or county health officer upon submission of written

evidence of religious objection or medical contraindication to

the administration of any vaccine. In the presence of an

outbreak of vaccine preventable disease as determined by the

state or county health authority, school children for whom a

waiver has been issued and who are not immunized against the

occurring vaccine preventable disease shall be excluded from

school attendance for a period of time determined by the state

or county health authority, but not suspended from school as

provided in W.S. 21-4-305. Children excluded from school

attendance under this section shall not be counted in the

aggregate number of pupils absent as defined in W.S.

21-13-101(a)(i).

(b) The school administrator shall be responsible for an audit of the immunization status of any child enrolled in the school in accordance with rules and regulations prescribed by the department of health.

(c) The written documented proof of immunization on a form provided by the state health officer shall be an integral part of the child's school record.

(d) For purposes of this section:

(i) "State health officer" means the person appointed by the governor pursuant to W.S. 9-2-103(e);

(ii) "County health officer" means the licensed medical officer designated by the county commissioners to serve as health officer for his county;

(iii) "Immunized" or "immunization" means initial immunization and any boosters or reimmunizations required to maintain immunization pursuant to the immunization standards and recommendations issued by the state health officer.