High court ruling exposes negligence risk hiding in specialist technical roles
Pregnant, pressured and still liable: a Hong Kong court has ruled that workload and pregnancy are no defence when professionals make obvious mistakes.
On January 22, 2026, the Hong Kong Court of First Instance handed down its judgment in Diagcor Bioscience Incorporated Limited v Chan Wai Hon Billy and others. The case is mostly about alleged misuse of genetic testing trade secrets. Tucked inside, though, is a striking ruling on employee negligence that goes straight to questions of accountability, workload and how far employers can rely on their specialists.
At the centre is Maggie Fang, a medical laboratory technologist who rose to Associate Laboratory Manager at biotech company Diagcor. Her role was not only technical. In the court's words, she acted as the "final gatekeeper" for genetic test reports. Once she signed, reports went out to doctors with no further check.
In December 2011, a doctor sent a pregnant patient, known in the judgment as Madam A, for an alpha-thalassaemia test. A junior technician ran the test and misread the result as normal. In fact, the foetus carried a serious inherited blood disorder. Fang reviewed the gel image, accepted the junior's interpretation and signed the report. The mistake was not picked up until April 2012, when the doctor queried the result. Diagcor later settled with the patient for HK$183,150 and said it lost roughly HK$1.7 million a year in referrals...
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