Adam, a 2 year old male, appears very sick. His mother explains that he has been vomiting and seems confused. She explains that his neck seems stiff and he is having trouble moving it. Upon a physical examination you discover a couple of purplish-red colored splotches on his back. His temperature reads at 104.3 degrees Fahrenheit. His mother is very concerned and doesn’t understand how he can seem so sick when he was playing fine and acting normal just a few hours ago. what is the diagnosis