symptoms pneumonia
Signs, Symptoms, and Complications. The signs and symptoms of pneumonia vary from mild to severe. But some people are at risk for developing more severe pneumonia or potentially fatal complications. Signs and Symptoms. If you have pneumonia, you also may have other symptoms, including nausea (feeling sick to the stomach), vomiting, and diarrhea. Symptoms may vary in certain populations. Newborns and infants may not show any signs of the infection.