On May 7, 2018, the Center for AIDS and STDs provided an annual refresher training on “Applying Respiratory Devices for Occupational Safety and Health Administration (OSHA)2018” at the 4^th floor meeting room, RIHES main building per NIH policy; RIHES main sponsor for the safety of staff with possible exposure to workplace toxic substance air pollution. The Respiratory Infection Control and Fit Test Measurement had been reviewed with the requirement to use only respiratory protection devices specified in the OSHA standards (29 CRF 1910.134) in this procedure. Dr. Nattapol kosashunhanan, physician of the Center for AIDS and STDs provided knowledge and demonstrated proper way to wear mask and how to test N95 mask. Trainees also had an opportunity to practice and receive medical assessment via Mandatory Medical Questionnaire.