Bhuyan, R. et al. 2022. A Preliminary Survey on the Oral Manifestation of COVID-19 in the First and Second Waves in Bhubaneswar, City of Odisha, India. National Journal of Community Medicine. 13, 05 (May 2022), 294–297. DOI:https://doi.org/10.55489/njcm.130520221617.