GAD1 and Hyperglycemia: During the acute phase of the infection, the detection of antibodies against islet cells (ICA) and against glutamic acid decarboxylase (GAD) was found positive.<h4>Conclusions</h4>The onset of hyperglycaemia after SARS-CoV-2 infection might be the result of a direct virus-induced toxicity or the effect of a virus-mediated activation of autoimmunity.