China's Wuhan city will test all of its 12 million residents for the coronavirus, an official said on Tuesday, after the place where the virus emerged in late 2019 confirmed its first domestic cases of the highly transmissible Delta variant. #COVID19 #Coronavirus #Wuhan #News #Reuters Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en