“Use of Mobile App for Real Time Data Entry and Monitoring: A Case Study of Anti-SARS-CoV-2 IgG Antibody Sero-Surveillance in all Districts of Haryana, India: Mobile App Use for Covid Sero-surveillance” (2020) International Journal of Health Systems and Implementation Research, 4(2), pp. 63–69. Available at: https://ijhsir.ahsas-pgichd.org/index.php/ijhsir/article/view/102 (Accessed: 17 October 2026).