The resulting adjusted serum NFL concentrations were as follows (geometric means and 95% confidence intervals are presented): encephalitis 79.4 pg/mL (CI 44.4–141.9), meningitis 10.3 pg/mL (CI 6.5–16.5), Ramsay Hunt syndrome 27.4 pg/mL (CI 12.9–58.1), “other neurological symptoms” 34.8 pg/mL (CI 13.9–87.3), herpes zoster controls 74.1 pg/mL (CI 49.7–110.4), and healthy controls 9.5 pg/mL (CI 6.6–13.6). Here, NEFL is linked to meningitis.