(1) An employer of a health care worker at risk of contracting an infectious disease in the course of employment shall provide to the worker preventive immunization for infectious disease if such preventive immunization is available and is medically appropriate.
(2) Such preventive immunization shall be provided by the employer at no cost to the worker.
(3) A worker shall not be required as a condition of work to be immunized under this section, unless such immunization is otherwise required by federal or state law, rule or regulation.