More than half (56.5%) of the patients with pneumonia had uneventful recovery. Mortality from M. pneumoniae pneumonia was high (12.5%) and occurred only in patients with underlying comorbidities. None of the 9 patients with no underlying comorbidities died of M pneumoniae pneumonia. The relatively high complications rate (16.7%) and mortality (12.5%) related to M. pneumoniae pneumonia are likely due to selection bias as most patients with pneumonia were sick enough to require admission to the hospital (21/24 or 87.5%) and most of them had comorbidities (20/24 or 83.3%).