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Can walking pneumonia permanently damage lungs? 

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We conclude that the size of consolidation and the side of its location can be used as predictors of severity of pneumonia, with left‐sided pneumonia running a more severe course, possibly due to increased risk for the development of pleurisy.
Patients who present with radiological pneumonia have worse outcomes compared to those admitted without pneumonia in exacerbation of COPD.
This concurrence significantly increases mortality due to pneumonia.
The incidence of ventilator pneumonia is high.
Conclusion The revision of WHO’s definition of severe pneumonia affects pneumonia epidemiology, and hence the interpretation of any pneumonia intervention impact evaluation.

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