the.com/pneumonia
When your lungs swap air for fluid and forget their one job.
means An infection that inflames the lungs' tiny air sacs, filling them with fluid or pus and making breathing a chore.
from From Greek pneumon, the lung, itself from pneuma, breath or spirit — the same root that animates pneumatic tires and the soul alike.
Top killerLeading infectious cause of death in children worldwide.
Many culpritsBacteria, viruses, and fungi all stake claims.
Silent floodingAffected air sacs drown in fluid, starving blood of oxygen.