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. Int J Hlth Sys Impl Res. 2020;4(2):63-69. Accessed October 17, 2026. https://ijhsir.ahsas-pgichd.org/index.php/ijhsir/article/view/102