Ventilation is a component of Dilution, a proven mitigation strategy to reduce the concentration of viral-laden airborne particles in the built environment. Our knowledge products will include topics on ventilation and recommendations to improve dilution through the application of ventilation. The determination of “ineffective” should be addressed by a trained professional in the region and we do provide guidance for who meets the criteria for a trained professional. Ventilation is not the only strategy for reducing disease transmission. Other complementary strategies include vaccination, human diagnostic testing, wearing of masks, social distancing, and being cognizant of the time spent in a room with others. While we are not voicing encouragement for employees to confront employers, it is the responsibility of each employer to provide a safe working environment for employees per the Occupational Safety and Health Act. Informed employees can share with employers their knowledge of environmental mitigation strategies that they have learned from their commitment to the Pledge. Information is power both to employees and employers.