Clinical and laboratory observationsSubacute Sclerosing Panencephalitis: The Foothold in Undervaccination

Subacute sclerosing panencephalitis (SSPE) is a fatal complication of measles infection. We present a case of a fully vaccinated 3-year-old boy who was diagnosed with and treated for autoimmune encephalitis before arriving at a diagnosis of SSPE. We discuss the challenges of diagnosing SSPE in developed countries.