IL6 and meningitis: On multivariable analysis controlling for age and HIV status and compared to serotype 10A, serotype 6D (coefficient [coef]: −12,712.82, highest density interval lower to upper bound [HDI]: −22,977.67, −2514.49) and 23A (coef: -10,979.91, HDI: −19,201.69, −2869.32) were associated with lower levels of IL-6 in the CSF of meningitis patients (Fig. 1A, Supplementary Table S4, Bayesian R2 = 0.44).