Hong Kong says starting from Monday all travelers from the US and Europe will be tested for COVID-19 upon arrival. The decision comes as Hong Kong identifies most of its imported cases with travel history to the US in Europe. Hong Kong began mandatory testing for passengers flying from Britain on Thursday. Those who test positive will be admitted to hospital while close contacts will be sent to designated quarantine centers. The Hong Kong government says it's looking to expand testing to all inbound travelers in the near future.