Ok I just did a little reading.
Little scary that something like the flu can kick this off.
Meningitis infection may show up in a person by a sudden onset of fever, headache, and stiff neck. It will often have other symptoms, such as
Nausea Vomiting Increased sensitivity to light (photophobia)
Altered mental status (confusion) The symptoms of bacterial meningitis can appear quickly or over several days. Typically they develop within 3-7 days after exposure.
It's good he's answering questions.
And as Sharke noted it is treatable with a very good success rate.
The biggest risk is the very young or very old and still an 85% success rate.
Sending good and positive vibes his way.
Mike