Ultraviolet light robots: The future of no-touch environmental disinfection in hospitals

Hospital-acquired infections (HAIs) continue to pose a significant burden on healthcare systems worldwide, both in terms of patient morbidity and financial costs. Environmental contamination plays a crucial role in the transmission of multidrug-resistant organisms, including methicillin-resistant Staphylococcus aureus, Clostridioides difficile and Acinetobacter baumannii. While manual cleaning and disinfection remain standard, they are subject to human error, variability in technique and often inadequate coverage of high-touch surfaces. In this context, ultraviolet-C (UV-C) light-emitting robots have emerged as a novel adjunct in environmental disinfection, offering consistent, automated and effective microbial reduction.[1] UV-C robots operate by emitting UV light in the 200–280 nm wavelength range, which damages microbial DNA and RNA, rendering pathogens non-viable.[2,3] These mobile robots can be programmed or manually positioned to disinfect patient rooms, operating theatres, intensive care units (ICUs) and other critical areas. Their no-touch nature ensures uniform coverage, including hard-to-reach surfaces, without the need for chemical agents or additional manpower. Numerous studies have demonstrated that UV-C disinfection can significantly reduce surface contamination and lower HAI rates when used as a supplement to terminal cleaning. For example, a multicentre randomised controlled trial reported a 30% reduction in C. difficile infections with UV-C implementation in targeted settings. Furthermore, these robots can deactivate SARS-CoV-2 within minutes, making them especially valuable during the COVID-19 pandemic and future outbreaks of respiratory viruses.[2,3] The advantages of UV-C disinfection robots include their ability to ensure standardisation and reproducibility by eliminating the variability associated with manual cleaning, thereby providing consistent results. They are also highly time-efficient, with disinfection cycles usually ranging from 10 to 30 min depending on room size and pathogen load.[1] Another benefit is the reduced reliance on chemical disinfectants, which minimises exposure to harsh agents for both patients and staff. In addition, many systems are equipped with automated data logging and compliance reporting features, enhancing accountability and traceability in infection control practices. However, several challenges remain. High upfront costs can be a barrier, particularly in resource-limited settings. In addition, UV-C light can be hazardous to human skin and eyes, requiring rooms to be unoccupied during operation. Shadowing remains a limitation, as UV-C effectiveness depends on direct line-of-sight exposure. Therefore, these robots are best used as adjuncts, not replacements, to manual cleaning. To maximise impact, hospitals must integrate UV-C robots into a broader infection control strategy. This includes training environmental staff, selecting appropriate deployment areas (e.g., isolation rooms and ICUs) and evaluating cost-effectiveness in terms of reduced infection rates and shorter patient stays. In conclusion, UV-C light robots represent a promising, evidence-based innovation in hospital disinfection. As health care moves towards automation and data-driven solutions, its role in improving patient safety and reducing HAIs is likely to expand. We encourage healthcare institutions, especially tertiary care centres, to consider piloting UV-C technologies and contributing to the growing body of literature evaluating their real-world impact. Financial support and sponsorship Nil. Conflicts of interest There are no conflicts of interest.