pneumonia, an ailment impacting lungs, inflames bronchi, alveoli, and trachea. concept

infection lungs bacteria viral pneumococcal inflammation respiratory symptoms fever cough antibiotics chest pain oxygen pneumoniae pulmonary alveoli bronchial complications immunization fluid pneumonitis xray sputum pneumotropic streptococcus mycoplasma legionella aspiration pathogen immune therapy virulence communityacquired nosocomial cap hcap vap antivirals radiograph microorganisms immunocompromised pulmonology edema consolidation empyema acute chronic control pneumocytes