Beijing After an employee at the main international airport of China's business city Shanghai was infected with Corona, 186 people were segregated and more than 8,000 people were screened. The city government said that apart from this, no other person has been found infected. However, it is not yet clear how the 51-year-old employee was infected. At the same time, more than 77,000 people were investigated after the case of infection in the northern port city of Tianjin. The National Health Administration said on Tuesday that 21 more people from abroad were found infected, while 426 people are undergoing treatment. 86,267 cases of this virus have been reported in China, of which 4,634 people have died.