Legendary singer Manna Dey passed away today at the age of 94 and media reports suggest that he had suffering from a lung infection for a few months. Is a lung infection something that only afflicts the elderly or smokers or can anyone suffer from it? Here are six things you should know about chest infections: What is a lung infection? A lung infection is a condition where the lungs get infected with either a virus or bacteria. It causes a lot of discomfort because as it progresses the patient is unable to breathe efficiently leading to a lack of