The most common symptoms of<unk>  are highly productive cough with expectoration of thick mucus, fever, and difficulties breathing. These often occur over a period of one to two weeks before medical attention is sought. The presence of fluid means the person experiences a feeling similar to 'drowning'. Difficulties breathing can quickly progress to an inability to breathe without support (respiratory failure).<unk>  typically progresses rapidly, with hospitalization and mechanical ventilation often required only days to weeks after initial symptoms of cough, fever, and difficulties breathing develop.
Acute interstitial pneumonitis
Acute eosinophilic pneumonia
Swimming-induced pulmonary edema
Cryptogenic organizing pneumonia
Chemical pneumonitis
Atypical pneumonia
Idiopathic interstitial pneumonia
Malignant pleural effusion