Chinese University scientists are aiming to identify the number of asymptomatic virus carriers in Hong Kong and bolster the city’s fight against Covid-19. In a HK$3 million government-funded study, 3,000 healthy residents from all walks of life will be randomly picked to provide blood or saliva samples for antibody tests that will be used to estimate the proportion carrying the deadly coronavirus  in the city without showing symptoms. Past studies have revealed those infected might exhibit only mild symptoms, or even none at all.

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