BEIJING—The death toll from the coronavirus outbreak in China climbed to six on Jan. 21 as authorities reported a surge in new cases, with fears that hundreds of millions of people traveling for the Lunar New Year holiday will accelerate the infection rate.
Officials confirmed that the new mystery virus can spread between humans and said 15 medical staff have now been infected, stoking fears about an international pandemic and prompting airport authorities around the world to step up screening of travelers arriving from China.
