(a) The department may conduct investigations, including epidemiological or toxicological investigations, of cases of specified birth defects.
(b) The department may conduct these investigations to determine the nature and extent of the disease or the known or suspected cause of the birth defect and to formulate and evaluate control measures to protect the public health. The department's investigation is not limited to geographic, temporal, or occupational associations and may include investigation of past exposures.
(c) A person shall provide medical, demographic, epidemiological, toxicological, and environmental information to the department under this chapter.
(d) A person is not liable in damages or other relief for providing medical or other confidential information to the department during an epidemiological or toxicological investigation.