This is cytomegalovirus (CMV) infection in the lung.Note the very large cells that have large violet intranuclear inclusions with a small clear halo.

• 巨细胞病毒(CMV)感染的病毒性肺炎，可见体积很大的细胞内有紫色核内包涵体，并且包涵体周围都有一清晰小光晕。