Denmark insisted that its pork produces posed no risk whatsoever, since the time it took to ship them to USA exceeded the two-week incubation period for foot and mouth.

丹麦坚持它的猪肉产品安全无危险，因为这些猪肉被运到美国时间超过了口蹄疫的两个星期的潜伏期。

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Whether the incubation period — the time it takes to develop symptoms after exposure to a mutated virus —differs from that for known influenza viruses, usually one to three days.

是否有潜伏期-在接触变异病毒之后有多长时间才产生症状-与已知流感病毒不同，通常是1-3天。

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SARS, says Longini, was contained partly because it has a relatively long incubation period of six days, giving authorities more time to respond.

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