看到了 CNN A 13th person in the United States has tested positive for the Wuhan coronavirus, a spokesman for the Centers for Disease Control and Prevention said. The patient arrived in the US last week at Marine Corps Air Station Miramar on a flight from Wuhan and has been held at the University of California, San Diego Medical Center. No further details on the patient’s condition were provided.
According to UC San Diego, hospital officials were informed by San Diego Public Health that four patients being evaluated for the virus tested negative. At the direction of the CDC, all four individuals were discharged and sent back into quarantine at MCAS Miramar. The hospital says the CDC later advised public health officials that, upon further testing, one of the four patients tested positive for coronavirus. The individual was "returned to UC San Diego Health for observation and isolation until cleared by the CDC for release." 这意思是，第一批撤侨的167人，只有4个被测试了，其中一个是第二次测才positive。日本撤侨是全部测试一遍吧？
“The earlier group of evacuees from China — about 200 people who have been staying at a military base near Riverside, Calif., since last week — were told on Wednesday that all of their tests for coronavirus had come back negative, officials said.” https://www.nytimes.com/2020/02/05/us/coronavirus-flights-wuhan.html
https://www.10news.com/news/local-news/first-confirmed-case-of-coronavirus-in-san-diego
测了两次才测出阳性？ 日本好像是全测了。
即使日本全测了，也还是会漏掉不少的。没有办法，技术的限制。
找到了一个新闻，说是另一批在riverside隔离的是全部测了，全部negative。所以估计这一批也是全部测的。
“The earlier group of evacuees from China — about 200 people who have been staying at a military base near Riverside, Calif., since last week — were told on Wednesday that all of their tests for coronavirus had come back negative, officials said.” https://www.nytimes.com/2020/02/05/us/coronavirus-flights-wuhan.html