At its peak, there were more than 50,000 confirmed cases of Covid-19 in Wuhan, and the city’s health commission wanted to ensure that the city avoids a second wave by ensuring it identifies any asymptomatic carriers.

Hundreds have already been identified. The Hubei provincial health commission says that 334 people across the province are under medical observation who are asymptomatic, and that a further 26 have been identified in the last 24 hours.

Yesterday, official media instructed citizens who had not yet been tested to register with their communities before 5pm today, in order that they can receive tests.

The official Xinhua News Agency says today that 6.5 million tests were carried out between 14 and 23 May, and some three million tests were carried out prior to the drive. There are 11.12 million people in Wuhan.