Rationale and Methods of the Study Protocol: Streptococcus pneumoniae Serotypes in Adults 18 Years and Older with Radiographically-Confirmed Community-Acquired Pneumonia (CAP)

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Abstract
Pneumonia remains a common cause of morbidity and mortality in the US. Although, communityacquired pneumonia (CAP) has traditionally been considered an acute process, more recently, data have emerged showing that patients surviving an episode of CAP are at increased risk of death long after hospital discharged. In this descriptive review, we examine the current knowledge of long-term mortality and propose a hypothesis explaining the pathogenesis of long-term mortality in patients with CAP.