NANDAGOPAL, M., A. BALAKRISHNAN, and C. PADHIAR. “TRINITY OF SEVERE ACUTE RESPIRATORY SYNDROME CORONAVIRUS-2: ORIGIN, GENOTYPE, PHENOTYPE, AND IMMUNE RESPONSE IN CORONAVIRUS DISEASE-2019”. Asian Journal of Pharmaceutical and Clinical Research, vol. 14, no. 9, Sept. 2021, pp. 28-36, doi:10.22159/ajpcr.2021.v14i9.42363.