The director, superintendent, or other person in charge of each hospital, sanitarium, asylum, or other public or private institution in the Virgin Islands to which people report for treatment of diseases or for cases of maternity or are confined voluntarily or by process of law, shall make and keep a register of all persons admitted thereto. This register shall contain all personal and statistical data regarding the inmates. In the case of any person admitted for treatment of any disease the physician in charge shall specify in the record the nature of the disease and the place where in his opinion it was contracted.