Infections and viruses are a common occurence. But, when is the flu, 'really' a flu? And when is a sore throat, a strep throat? Do ear infections always need a course of antibiotics? What are the types of pneumonia or the symptoms of chronic bronchitis? And, most importantly, once your doctor has identified your illness, what are the common treatments that are prescribed? Find out more about the many infections and viruses that afflict us.