Veteran actor Dilip Kumar has been hospitalized in Mumbai's Lilavati Hospital reportedly after he complained of chest infection and difficulty in breathing. Chest infections are common in the elderly population and the veteran actor is struggling with various health issues at the age of 95. However chest infection is not all about age there could be a host of reasons for one to get infected. Chest infections are either viral or bacterial infections that affect the lungs the large airways or the smaller air capillaries. These infections can make the lungs swollen and inflamed due to mucus and fluid build-up.