<unk>  is an acute event characterized by a worsening of the patient’s respiratory symptoms (baseline dyspnea, cough, and/or sputum production) that is beyond normal day-to-day variations and leads to a change in medication.
COPD exacerbation
Asthma exacerbation
CMV pneumonitis
Acute chest syndrome
Adams-Stokes syndrome
Exercise induced asthma
Viral pneumonia
COVID-19 and influenza co-infection