High humidity creates a favorable environment for the growth and survival of many pathogenic microorganisms, increasing the risk of healthcare-associated infections (HAIs). Moist conditions promote microbial proliferation on surfaces and medical equipment, facilitating transmission. Additionally, high humidity can impair the effectiveness of sterilization processes and promote the formation of biofilms. This contrasts with low humidity, which tends to reduce microbial survival. Maintaining controlled humidity levels is crucial to minimize microbial contamination and reduce HAIs in healthcare settings.

Reference: Infection Control and Hospital Epidemiology, Edmond J. Byrd Jr., 5th Edition.