Disclosed is the use of a an effective amount of an antigenic composition comprising attenuated cells of one or more microbial pathogen, wherein the microbial pathogen is selected from the group consisting of Klebsiella pneumoniae, Streptococcus pneumoniae, Moraxella catarrhalis, Mycoplasma pneumoniae, Haemophilus influenza, influenza virus, adenovirus, respiratory syncytial virus, and parainfluenza virus, in the manufacture of a medicament for the treatment of cancer situated in a lung tissue in a human patient.