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進入《TAIPEI TIMES》 Cluster infection suspected on plane
A security guard takes a passenger’s temperature at Taiwan Taoyuan International Airport on Nov. 30. Photo courtesy of Taiwan Taoyuan International Airport
‘LIKELY SOURCE’: A crew member from New Zealand did not wear a mask during a flight and said he did not have any COVID-19 symptoms, but was reportedly coughing
By Lee I-chia / Staff reporter
The Central Epidemic Command Center （CECC） yesterday reported three new cases of COVID-19, including two airline employees.
The two flew on the same plane as a Taiwanese pilot who was confirmed to have COVID-19 on Friday, indicating a cluster of infections in the flight cabin, the CECC said.
The pilot, case No. 760 in the nation, flew to the US on Dec. 12, returned on Wednesday, began showing symptoms during quarantine at the airline’s dormitory and tested positive for COVID-19 on Friday, said Centers for Disease Control Deputy Director-General Chuang Jen-hsiang （莊人祥）, the CECC’s spokesman.
One of the new cases, No. 765, is a New Zealander in his 60s who flew to the US on Nov. 29, returned to Taiwan on Dec. 4 and flew to the US again on the same flight with case No. 760 on Dec. 12, during which he was reportedly coughing, Chuang said.
He returned to Taiwan on Tuesday and had been under home quarantine, but after case No. 760 was confirmed, he was tested the same day, and the result came back positive yesterday, Chuang said.
The man also tested positive for antibodies against COVID-19, he added.
Case No. 766 is a Japanese man in his 20s who flew to the US on Dec. 5, returned to Taiwan on Dec. 7, flew to the US again on the same flight with case Nos. 760 and 765 on Dec. 12, and returned to Taiwan on Tuesday.
On Thursday, he reported that he was coughing and was tested on Friday, Chuang said, adding that he developed diarrhea on Saturday and his test result came back positive yesterday, but an antibody test came back negative.
The three cases are likely a cluster of infections that occurred within the airplane cabin, Chuang said, adding that case No. 765 is most likely to be the source, as he has a higher cycle threshold value （CT value） of 24.9 and has developed antibodies against COVID-19.
The CT values of cases 766 and 760 were 15.2 and 17 respectively, he said.
A higher CT value indicates lower viral load and a lower risk of infectivity.
Case No. 765 first flew to the US on Nov. 29 and returned to Taiwan on Dec. 4, so if he contracted the disease during the period, he would still be infectious during the flight on Dec. 12, Chuang said, adding that his colleagues reported that he had been coughing without a mask during the flight.
The CECC found that case No. 765 left the airline dormitory during his rest days from Dec. 8 to Dec. 11, so contact tracing personnel are examining his iPad to find out where he was during the period.
Asked if the Taiwanese airline is at fault for letting crew members with symptoms work in a plane without wearing a mask, Chuang said case No. 765 said he did not have any symptoms, but was reported to be coughing, so the center would ask the Civil Aeronautics Administration and the airline to investigate and clarify the situation.
The third new case reported yesterday is an Indonesian man in his 40s, who came to Taiwan for work on Dec. 3 and had provided a negative polymerase chain reaction test result from within three days before departing.
He did not show any symptoms in Taiwan, Chuang said.
The shipping service company he works for paid for a COVID-19 test when his quarantine ended on Friday and the result came back positive yesterday, he said.
Eight crew members who work on the same ship have been placed under home isolation, he added.
新聞來源：TAIPEI TIMES
