On Wednesday, China lifted the blockade on the epicenter of the virus in Wuhan, and China discovered a new coronavirus.
As the number of infected overseas travelers has surged, new cases in mainland China have doubled in 24 hours, and new asymptomatic infections have more than tripled, forcing the authorities to strengthen measures to prevent local transmission.
The National Health Commission said the number of newly diagnosed cases increased from 32 a day ago to 62 on Tuesday, the highest level since March 25. 59 cases of newly imported infections.
Health authorities said on Wednesday that the number of new asymptomatic cases has more than tripled to 137, with 102 inbound passengers.
Chinese authorities do not consider asymptomatic cases as part of a confirmed coronavirus infection until the patient has symptoms such as fever or cough.
In order to prevent infections from abroad, China reduced the number of international flights and refused the entry of almost all foreigners.
The government has recently strengthened screening of land passengers.
China also maintains strict health check agreements at home, and is worried about any renaissance of domestic transmission, especially among asymptomatic virus carriers.
The curbstone in the center of Wuhan, which has been in a blockade since January, has been lifted, and new cases have increased. In the past 15 days, the provincial capital of Hubei Province has confirmed only two new infections.
China blocked the cities of 11 million people to prevent the spread of influenza-like viruses to other parts of the country. According to official data, more than 50,000 people in Wuhan have been infected with the virus, and more than 2,500 people have died.
The National Health Council said that as of Tuesday, the total number of confirmed cases in mainland China was 81,802, of which 3,333 people died.