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SINGAPORE – Three of the four Covid-19 cases found among workers and volunteers at the Singapore Expo community care center have been re-analyzed and negative results found.
One of them, a 43-year-old Singapore radiographer, was a false positive, one of 33 cases that arose from a problem calibrating the apparatus for a test kit. It had been reported as a confirmed case on May 7.
In a press release on Sunday (May 10), the Health Ministry said that after the review, 33 tests from a laboratory were found to be false positives and subsequent tests at the National Laboratory of Public Health confirmed that they were of negative cases.
The ministry emphasized: “No false negative results were found from our review.”
Immediate steps were taken to rectify the situation, the ministry said, adding that the laboratory has stopped all tests and is working to resolve the problem.
Furthermore, it was shown that the other two confirmed cases at the Expo facilities, a 20-year-old nurse and a health care volunteer, 52, had “equivocal” results.
The Ministry of Health said that both “were subsequently verified as negative by retesting.”
The nurse had been reported as a confirmed case on May 5 and the volunteer on May 4.
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