Atypical pneumonia refers to an infection of the lung that is caused by certain organisms such as Mycoplasma, Legionella and Chlamydia. SARS is a type of atypical pneumonia.

• 根据这些解释，我们知道除了来势汹汹的SARS属于非典型肺炎外，过去支原体、团杆菌和衣原体等也有造成人类患上非典型肺炎的“本事”。而今后，当然不能排除还会出现其他因子和病因，导致非典型肺炎。