§ 2161. Poliomyelitis; persons twenty-one years of age and over; care and maintenance. Every county or part-county health commissioner, city health officer in cities having more than fifty thousand population, and state district health officer shall, within their respective areas and after approval by the commissioner, provide at the remediable stages of the disease known as poliomyelitis, suitable surgical, medical or therapeutic treatment or hospital care, and necessary appliances and devices for all persons twenty-one years of age or over including Indians residing on reservations, so infected or exposed who cannot otherwise be provided for. In a county the determination as to what persons cannot otherwise be provided for and relevant matters shall be made by the board of supervisors of such county against which the same is to be a charge and an investigation and report thereon to such board upon which to make its determination shall be made by the public welfare commissioner or such other county officer, or committee of the board as the board of supervisors may designate by resolution. The charges approved for such treatment shall be in full payment thereof and shall be accepted by the person or corporation furnishing such treatment as full payment and no such person or corporation shall ask or receive directly or indirectly any other or additional compensation.