100 million adults. Viral pneumonia is more prevalent in the very young, less than 5 years old, and in the very old, more than 75 years old. Developing countries have a higher rate of incidence when it comes to viral pneumonia. On average, developing countries have an incidence rate five times higher than that of developed countries. Being pregnant can also affect the chances of developing viral pneumonia. As with all infectious diseases, viral pneumonia preys on the immunocompromised as well as individuals with one or more comorbidities especially those with: Trauma Severe burns Diabetes Malnutrition Poverty Environmental Exposure Group living References External links Pneumonia