MOG and pneumococcal meningitis: Lower frequencies of CSF‐restricted MOG‐IgG have been reported in a national UK audit which identified that only 4/533 (0.8%) paired serum/CSF samples demonstrated CSF‐restricted MOG‐IgG4; with two presenting with LETM, a potential phenotype for MOGAD; and one with pneumococcal meningitis; and a number needed to test of 133 to identify one extra MOGAD patient.4