how long is the incubation period for viral pneumonia
After you've been infected with a pneumonia-causing organism, it takes as little as 1 to 3 days or as long as 7 to 10 days for symptoms to appear.How severe pneumonia is and how long it lasts depend on: 1  Your age and health. 2  Older, sicker people usually have more severe cases. And their cases of pneumonia are more likely to cause complications, such as bacteria in the bloodstream (bacteremia) or throughout the body (septicemia). 2  Whether bacteria or a virus caused the pneumonia. 3  Viral pneumonia usually is less severe than bacterial pneumonia. 4  How quickly you treat it.