<prompt> Answer this question truthfullyWhat is meningitis and how does it become viral? The original sentence is already in proper English  <response>: <reason> Meningitis was first discovered by Hippocrates. Wallgren described aseptic meningitis in 1924 and defined it as a disease with acute onset that has typical systematic symptoms of meningeal involvement, in association with a cerebrospinal fluid CSF typical of meningitis typically with a mononuclear cell predominance. Additionally, there was absence of bacteria on stain and culture and there was no identifiable parameningeal infection. 