PREVIEW
Determining whether a patient has viral pneumonia can be tricky. Even when a virus is isolated, it may not be the cause of the pneumonia. Here, Drs Chien and Johnson discuss the means of making this elusive diagnosis with confidence. Parts 2 and 3 of this three-part article, which focus on viral pneumonia in the immunocompromised host and viral pneumonia due to epidemic respiratory viruses, will appear in our February and March issues.