HONG KONG - Health officials have decided to cull over 1,000 hamsters as another COVID-19 case linked to a pet shop cluster was among the 18 new infections reported in the city on Tuesday.

Wearing medical masks can protect people from Covid-19 infection at least 75 per cent of the time, according to an experiment by a Hong Kong microbiologist, Dr Manoon Leechawengwongs, a Thai respiratory disease specialist, informed through his fanpage on Saturday (May 23).