"The health of those who live, attend school, or work in damp buildings has been a growing concern through the years due to a broad range of reported building-related symptoms and illnesses. [...] Researchers have not found exactly how much exposure to dampness-related substances it takes to cause health problems. Research studies report that finding and correcting sources of dampness is a more effective way to prevent health problems than counting indoor microbes. Therefore, NIOSH [National Institute for Occupational Safety and Health] developed a tool to help assess areas of dampness in buildings and to help prioritize remediation of problems areas."
Publication No. 2019-114
Centers for Disease Control and Prevention: https://www.cdc.gov/