BEIJING (The Straits Times/ANN): Beijing health authorities have stepped up testing efforts to identify false negatives from Covid-19 tests after a woman tested negative four times before her infection was finally confirmed.
Pang Xinghuo, a deputy director of the Beijing municipal centre for disease prevention and control, said at a press conference on Thursday (June 25) that the 60-year-old patient had tested negative for Covid-19 on four nucleic acid tests, sampled via throat swab, during the first week of her hospitalisation that started on June 16.