Section 62A. In each city and town which accepts this and the six following sections, in a city by vote of its city council subject to the provisions of its charter, or in a town by vote of its inhabitants, there shall, except as provided by section sixty-two F, be established, without unreasonable delay, one or more children’s health camps for the care and treatment of children of school age in said city or town who upon examination are found to be in need of such care and treatment, but no child shall be given care or medical treatment whose parent or guardian objects thereto.