Response to Mungall et al. letter to the editor on Streptococcus pneumoniae serotype 19A: worldwide epidemiology. Expert review of vaccines 2017;16(10):1007–27. (3rd August 2018) - Isturiz, Raul; Sings, Heather L.; Hilton, Betsy; Arguedas, Adriano; Reinert, Ralf-Rene; Gessner, Bradford; Jodar, Luis