Aggarwal, Juhi, Sojit Tomo, Jyoti Batra, and Pradhumn Katara. “Comparative Retrospective Study of Biochemical and Haematological Biomarkers and Their Alterations in First and Second COVID-19 Wave in a Tertiary Care Facility in Ghaziabad”. International journal of health sciences 6, no. S3 (May 23, 2022): 7228–7245. Accessed September 30, 2026. https://sciencescholar.us/journal/index.php/ijhs/article/view/7737.