Siva Ram 2021. Scientific Evaluation of Dhuma Yoga (An Ayurvedic Fumigation Medicine) as Preventive and Curative on Symptoms of Covid-19 Disease. International Journal of Ayurveda and Pharma Research. 9, 6 (Aug. 2021), 49-61. DOI:https://doi.org/10.47070/ijapr.v9i6.1969.