Edwin Klebs ndiye akatanga kucherechedza mabhakitiriya mumigwagwa yevanhu vakafa nechirwere chemapapu muna 1875. Basa rekutanga rekuziva mabhakitiriya maviri anowanzoitika, Streptococcus pneumoniae naKlebsiella pneumoniae, rakaitwa naCarl Friedländer naAlbert Fraenkel muna 1882 na1884. Basa rekutanga raFriedländer rakaunza Gram stain, bvunzo yakakosha yemarabhoritari ichiri kushandiswa nhasi kuziva nekusiyanisa mabhakitiriya. Chinyorwa chaChristian Gram muna 1884 chakatsanangura maitiro acho chakabatsira kusiyanisa mabhakitiriya maviri, uye chakaratidza kuti pneumonia inogona kukonzerwa neanopfuura imwechete microorganism. Sir William Osler, anozivikanwa sa "baba vekurapa kwemazuva ano", akakoshesa kufa uye kuremara nemapapu, achirondedzera se "mukuru wekufa kwevarume" muna 1918, sezvo yakanga yakunda tuberculosis seimwe yezvinokonzera kufa kwepneumonia muna 1882 na1884.
Carl Friedländer naAlbert Fraenkel