Ngwira, L., Sharma, B., Shrestha, K., Dahal, S., Tuladhar, R., Manthalu, G., Chilima, B., Ganizani, A., Rigby, J., Kanjerwa, O., Barnes, K., Anscombe, C., Mfutso-Bengo, J., Feasey, N. & Mvundura, M. 2022, 'Cost of wastewater-based environmental surveillance for SARS-CoV-2: evidence from pilot sites in Blantyre, Malawi and Kathmandu, Nepal', PLoS Global Public Health, 2(12), article no: e0001377. https://doi.org/10.1371/journal.pgph.0001377