California laws require employers with employees exposed to aerosol transmissible diseases (ATD) to have effective written safety plans, provide protective equipment as needed, and train employees on safety procedures to meet the requirements of the Cal/OSHA Aerosol Transmissible Diseases standard (California Code of Regulations, title 8, section 5199) to reduce the risk of ATD infection to their employees. Before COVID-19 dental practices were exempt from this regulation if they complied with all of the above. Today, the risk of employee exposure to COVID-19 exists and respiratory protection is needed for aerosol generating procedures.