Incubation period. 3 to 9 days.

3至9天。

The incubation period is usually 3 to 14 days.

潜伏期通常为3—14天。

Transmission, life-cycle and incubation period.

传播、生命周期和潜伏期。

The disease has an incubation period of 3 to 9 days.

该病的潜伏期为3至9天。

The incubation period is from a few and up to 48 hours.

潜伏期从几小时至48小时。