Murhekar, M. V., Kamaraj, P., Kumar, M. S., Khan, S. A., Allam, R. R., Barde, P. V., Dwibedi, B., Kanungo, S., Mohan, U., Mohanty, S. S., Roy, S., Sagar, V., Savargaonkar, D., Tandale, B. V., Topno, R. K., Kumar, C. P. G., Sabarinathan, R., Bitragunta, S., Grover, G. S., Lakshmi, P. V. M., Mishra, C. M., Sadhukhan, P., Sahoo, P. K., Singh, S. K., Yadav, C. P., Kumar, R., Dutta, S., Toteja, G. S., Gupta, N., Mehendale, S. M., , , Karunakaran, T., Govindhasamy, C., Daniel Rajasekar, T., Jeyakumar, A., Suresh, A., Augustine, D., Ashok Kumar, P., Jose, A., Sivakumar, R., & Banerjee John, J. (2021). immunity against diphtheria among children aged 5–17 years in India, 2017–18: a cross-sectional, population-based serosurvey. Lancet infectious diseases, 21(6), 868–875. http://access.bl.uk/ark:/81055/vdc_100130756582.0x000013