After these initial prodromal symptoms comes the exanthem phase, which is where a red, blotchy, maculopapular rash spreads in a cephalocaudal progression.

在这些初期症状之后是皮疹期，即发红的斑状丘疹在头颈部扩散。

During the prodromal phase, patients might become withdrawn and spend most of their time alone, and often this seems similar to other mental disorders like depression or anxiety disorders.

在前驱期，患者可能会变得孤僻，大部分时间都一个人呆着，很多时候这种表现与其它精神疾病相似，比如抑郁症和焦虑症。

Following an active phase, patients often enter into a residual phase, where they might exhibit cognitive symptoms like not being able to concentrate or becoming withdrawn again, as with the prodromal phase.

急性期后，患者通常会进入残留期，这时患者可能表现出认知障碍，如无法集中注意力，或者和前驱期一样再次变得孤僻。

In general, infected people are most contagious starting from the final day of the incubation period through the prodromal and exanthem phase, which roughly works out to be 4 days before to 4 days after the onset of the rash.

一般来说，感染者极具传染性，从潜伏期的最后一天开始，经过前驱期和皮疹期，大约是从出疹前4天到后4天为止。