INS and Hyperglycemia: The other was a 52-year-old female patient who developed hyperglycemia and weight loss after the first dose of the Pfizer vaccine and was on insulin aspart after that, until she developed nausea, palpitation, respiratory distress, and severe acidosis immediately after the second dose of the Pfizer vaccine, after which she was managed with intravenous insulin and other therapies, and her DKA recovered gradually [30].