A COVID-19 outbreak has reoccurred in Shanghai in recent days, with multiple confirmed local cases. From Nov. 25 to Nov. 26, more than 20 hospitals were shut down in the city, with many local hospitals also suspending emergency services. Three of the four newly confirmed local cases in China reported on Nov. 25 were in Shanghai, and one was reported in the city of Dalian in Liaoning province. The three patients in Shanghai had all visited Suzhou in nearby Jiangsu province. Both the city of Hangzhou in Zhejiang province and the city of Xuzhou in Jiangsu have also reported new cases, all of whom had dinner with the confirmed patients in Shanghai. Shanghai has tightened its pandemic control measures. On Nov. 26, more than 30 percent of flights at Shanghai Pudong International Airport and nearby Xuzhou Guanyin International Airport were canceled. The Shanghai City Bus and Shanghai Long-Distance Passenger Terminal …