https://www.canada.ca/en/public- ... -professionals.html
The incubation period ranges from 1 to 14 days. The median is 5 to 6 days between exposure and symptom onset. Most people (97.5%) develop symptoms within 11.5 days of exposure.
97.5%以上的人都是在11.5天内就有症状了。
这个人是13天以后PCR检查(不知道是抽查还是有了症状才检查)才出现阳性,就算她当时已经出现症状,她入境前感染的可能性也不到2.5%,说大概率入境后才感染没有错。
40岁加拿大女侨胞搭乘厦航回国确诊