Asian Wastewater Surveillance: Current Status and Future Directions

Duke-NUS Medical School in Singapore has published a study evaluating the current status and future directions of wastewater surveillance in Asia. The research, featured in the International Journal of Environmental Health Research, highlights the potential of wastewater surveillance for early detection of pathogens, particularly in regions with high population density and challenging health systems.

Asia faces a significant risk of outbreaks, making wastewater surveillance a valuable tool due to its low cost and non-invasive nature. It can provide early signals of pathogens, emergence of new variants, and the intensity of transmission. During the COVID-19 pandemic, wastewater surveillance demonstrated its ability to detect variants up to a week ahead of clinical data.

The study analyzed 19 Asian countries and found a rapid uptake of wastewater surveillance, with 89 projects led by 45 institutions. However, only 20% of these initiatives are integrated into routine national surveillance systems, and most remain research-oriented, focusing on single pathogens.

According to the study, clear public health use cases, standardized protocols, sustained domestic financing, and broader cross-sector collaboration are needed for wastewater surveillance to be effectively utilized in public health decision-making. Furthermore, advances in genomics should be leveraged to enable broader monitoring that can identify multiple pathogens simultaneously. The initiative aims to continue promoting more systematic wastewater surveillance in collaboration with national stakeholders.