1. Diagnosis of new-onset diabetes (or established diabetes requiring insulin initiation)2. Not in DKA3. Plasma BOHB < 1.5 mmol/L. If initial BOHB is 1.5–2.5 mmol/L, administer a rapid-acting insulin bolus and repeat BOHB in 2–3 h to make sure it is < 1.5 mmol/L.4. COVID-19 symptoms screening and/or test negative. Here, INS is linked to diabetes mellitus.