Hello,
Pneumonia is an inflammatory illness of the
lung. When an
infection develops, there is an inflammation of the air passages beyond the windpipe. Part of our immune response results in the formation of mucus and catarrh, which takes a couple of weeks to clear. If the attacking bacteria or virus is particularly aggressive, or we are run down and immuno-suppressed, the bug may multiply rapidly to invade a whole area of lung tissue.