Diagnosis

（1）have a history of chest infections，HIV positive，sudden onset of symptoms.

（2）Examination：confusion of consciousness，cyanosis，tachypnea，hypotension signs of consolidation（crackles，BBS，dullness on percussion，increased vocal resonance）(https://www.daowen.com)

（3）NB：auscultation may be normal.

（4）Necessary examinations：CXR，FBC，sputum analysis.