Medical workers hold a strike the outside Hospital Authority as they demand for Hong Kong to close its border with China to reduce the coronavirus spreading, in Hong Kong, China February 4, 2020. Hong Kong health workers escalated their strike on Tuesday (February 4), demanding the full closure of borders with mainland China by authorities, despite the recent closures to further contain the coronavirus. REUTERS/Tyrone Siu

Medical workers hold a strike outside the Hospital Authority as they demand for Hong Kong to close its border with China to reduce the coronavirus spreading, in Hong Kong, China February 4, 2020. Around 2,700 workers from the Hospital Authority Employees Alliance went on strike on Monday (February 3) to call for a sealing off of Hong Kong's border and for better protection for hospital staff. REUTERS/Tyrone Siu

Medical workers hold a strike outside the Hospital Authority as they demand for Hong Kong to close its border with China to reduce the coronavirus spreading, in Hong Kong, China February 4, 2020. Hong Kong reported its first coronavirus death on Tuesday, a 39-year-old male who had been suffering from an underlying illness and had visited China's Wuhan city in January, hospital staff said, marking the second death outside mainland China. REUTERS/Tyrone Siu

Medical workers hold a strike outside the Hospital Authority as they demand for Hong Kong to close its border with China to reduce the coronavirus spreading, in Hong Kong, China February 4, 2020. REUTERS/Tyrone Siu

Winnie Yu, chairwoman of the Hospital Authority Employees Alliance (HAEA), speaks during a strike outside the Hospital Authority as they demand for Hong Kong to close its border with China to reduce the coronavirus spreading, in Hong Kong, China February 4, 2020. REUTERS/Tyrone Siu

Medical workers hold a strike outside the Hospital Authority as they demand for Hong Kong to close its border with China to reduce the coronavirus spreading, in Hong Kong, China February 4, 2020. REUTERS/Tyrone Siu