Pedestrians wear face masks in Hong Kong on February 3, 2020, as a preventative measure following a virus outbreak which began in the Chinese city of Wuhan. – Hundreds of Hong Kong medical workers walked off their jobs on February 3, demanding the city close its border with China to reduce the coronavirus spreading — with frontline staff threatening to follow suit in the coming days. (Photo by Anthony WALLACE / AFP) (Photo by ANTHONY WALLACE/AFP via Getty Images)