 The timing of the first signs and symptoms in Dravet syndrome occur about the same time as normal childhood vaccinations, leading some to believe the vaccine was the cause.However, this is likely a non-specific response to fever, as vaccination often induces fever, and fever is known to be associated with seizures in persons with Dravet syndrome.Some of the patients who put forth vaccine injury claims from encephalopathy were later found, upon testing, to actually have Dravet syndrome.