For the second half of the 19th century and the early part of the 20th, pneumonia was a leading cause of death that killed hundreds of thousands of people. Sir William Osler – usually considered the ...

Cases of "walking pneumonia" — a milder form of the lung infection pneumonia — have spiked in the United States, particularly among young children. Bacterial infections from Mycoplasma pneumoniae, one ...

Pneumonia is an infection that affects one or both lungs, and can be caused by bacteria, virus or fungus.

Add Yahoo as a preferred source to see more of our stories on Google. Walking pneumonia, a lung infection caused by the bacterium Mycoplasma pneumoniae, tends to be most common among older children ...