No person known to be infected with a communicable disease, or suspected of being infected with a communicable disease, or who has been found to be a carrier of disease-producing organisms, shall engage in the commercial handling of food, or be employed at a dairy or on premises handling milk or milk products, until he or she is determined by the Department of Health to be:

1. (1) Free of such disease; or
2. (2) Incapable of transmitting the infection.