Headache and malaise may persist for weeks.[4]Centers for Disease Control and Prevention. Viral meningitis. May 2021 [internet publication].
https://www.cdc.gov/meningitis/viral.html
[6]McGill F, Griffiths MJ, Bonnett LJ, et al. Incidence, aetiology, and sequelae of viral meningitis in UK adults: a multicentre prospective observational cohort study. Lancet Infect Dis. 2018 Sep;18(9):992-1003.
https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(18)30245-7/fulltext
http://www.ncbi.nlm.nih.gov/pubmed/30153934?tool=bestpractice.com