(HealthDay News) -- Pneumonia is a lung infection that most often spreads through coughing, sneezing or touching.
Most people recover in one to three weeks, but pneumonia can be deadly, especially among people with weaker immune systems.
The American Lung Association explains how pneumonia may be diagnosed:
Robitussin Honey Cough Syrup Recalled Due to Fungal Threat
Antibiotics Probably Won't Ease Your Cough, Even If Infection is Bacterial: Study