In a study of 27 pediatric COVID-19 patients with multisystem inflammatory syndrome, 15% (n = 4) exhibited new-onset neurological symptoms, such as encephalopathy, headaches, brainstem, and cerebellar signs, weak muscles, and poor reflexes [89]. Cerebrospinal fluid testing in two patients were acellular; three patients underwent nerve conduction and electromyographical studies, which revealed mild myopathic and neuropathic deficits. All four patients improved, two of whom made a complete recovery over the course of the study [89].