The time between exposure to the virus and the onset of symptoms (incubation period) is usually 2 to 14 days, although for one case reported in China, symptoms appeared 27 days after exposure.
Muda kati ya kuambukizwa virusi na kutokea kwa dalili (kipindi cha kupevuka) kwa kawaida ni kati ya siku 2 na 14, ijapokuwa kumekuwa na kisa kimoja kilichoripotiwa nchini Uchina ambapo dalili zilitokea siku 27 baada ya kuambukizwa.