Cigarette smoking is by far the biggest risk factor for lung cancer, data shows — but in a surprising turn of events, the most common form of the disease is primarily found in non-smokers.

A week before actor Gene Hackman died of heart disease in their New Mexico home last month, his wife, Betsy Arakawa, had died from hantavirus pulmonary syndrome, a rare pulmonary disease linked to ...

giving it a larger surface area to volume ratio than larger structures number - there are around 700 million alveoli – ie 350 million per lung The total surface area of the alveoli is around 70 ...