Linked from
The 22 pages that link to Pneumonia, each with the reason it gives.
HypoxemiaRelated: Inflamed, fluid-filled alveoli impair gas exchange and can cause hypoxemia.
LungRelated: Fluid or inflammatory material in alveoli can impair oxygen exchange.
Respiratory systemRelated: Inflamed, fluid-filled alveoli can reduce oxygen transfer into blood.
BacteremiaRelated: Severe pneumonia can allow its causative bacteria to enter the bloodstream.
Child mortalityRelated: Pneumonia remains a major infectious cause of death among young children.