Muthuprasanna Pichandy, Komala M and Padmavathy J (2020) “COVID-19 – A Review from Endemic to Pandemic spread of the virus”, International Journal of Pharma and Bio Sciences, 11(3), pp. 69–94. Available at: https://ijpbs.net/index.php/journal/article/view/6837 (Accessed: 23 July 2026).