INS and type 1 diabetes mellitus: Both were known cases of T1DM for six years, were on regular insulin therapy, and had received their second doses of the inactivated virion-based vaccines COVASHIELD (ChAdOx1 nCoV-19) and COVAXIN (inactivated whole-virion vaccine BBV152; Bharat Biotech, Hyderabad, India) three and six days before symptom aggravation, respectively.