Viral pneumonia is caused by one of several viruses, including influenza, parainfluenza, adenovirus, rhinovirus, herpes simplex virus, respiratory syncytial virus, hantavirus, and cytomegalovirus.

• 病毒性肺炎的原因是其中一个病毒，包括流感，副，腺病毒，鼻病毒，单纯疱疹病毒，呼吸道合胞病毒，汉他病毒，并巨细胞病毒。