The government should make mask wearing mandatory and step up enforcement of social-distancing laws to prevent Covid-19 transmission, the University of Hong Kong’s top microbiologist has said.Dr Ho Pak-leung’s comments came a day after HKU infectious disease expert Yuen Kwok-yung warned of a third wave of infections as mainland Chinese gradually return to Hong Kong, and senior government adviser Bernard Chan suggested the possibility of a strict lockdown.Ho on Monday urged the Hong Kong…
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