Tina's three-year-old neighbor presents to the clinic with fever, neck pain, headache, and confusion. He has no symptoms of an upper respiratory...

Tina's three-year-old neighbor presents to the clinic with fever, neck pain, headache, and confusion. He has no symptoms of an upper respiratory infection. The parents mention that they do not believe in immunizations. Based on the information given, what diagnosis is of the greatest concern? What is your next action?