J. Robinson, A. Leclézio, and I. Banerjee, “COVID-19: Intranasal and Oral Routes of Vaccination”, J. Lumbini Med. Coll., vol. 9, no. 1, May 2021, Accessed: Jul. 18, 2026. [Online]. Available: https://nepjol.info/index.php/JLMC/article/view/43062