Pradeep, K., Samundeswari, G., Niranjan, R., Dorthy, V., Malar, I., Velavan, A., Konduru, R. K., Kumar, P., & Purty, A. J. (2022). Role of active and passive surveillance in early case detection and prevention of disease spread in COVID-19 pandemic: our experience. International Journal of Research in Medical Sciences, 10(3), 704–707. https://doi.org/10.18203/2320-6012.ijrms20220522