Let's remember that what they are talking about
is
NOT a symptom, but a specific
viral infection:
"Tick-borne encephalitis (TBE) is caused by an RNA virus known, simply, as “tick-borne encephalitis virus,” or TBEV. "
And that's why other sites will say this: "Several thousand cases of encephalitis are reported each year..."
www.ninds.nih.gov/disorders/encephalitis_meningitis/detail_encephalitis_meningitis.htm Symptoms of encephalitis are:
Signs and symptoms may last for two to three weeks, are flu-like, and can include one or more of the following which in some individuals may become progressively worse and continue over time:
Fever
Fatigue
Sore throat
Stiff neck and back
Vomiting
Headache
Confusion
Irritability
Unsteady gait
Drowsiness
Visual sensitivity to light
More severe cases may involve these signs and symptoms:
Seizures
Muscle weakness
Paralysis
Memory loss
Sudden impaired judgment
Poor responsiveness
I've had every one of those symptoms, and I know that many members here have had at least some of those symptoms.