Qiu Haibo, a member of the China National Health Commission’s expert group , said the incubation period for the virus in patients in the Northeast was longer than that in Wuhan City, the disease center. was first discovered globally.

The expert also revealed that the COVID-19 strain discovered in the Northeast is different from the original strain in the country. This shows that the virus causing COVID-19 is continuing to change.

" The problem is they don’t have any symptoms. So when they get together with family , they don’t care about infection and we have family patient clusters, " Qiu said.

Qiu said patients in the Northeast take longer to recover and rarely have a fever. The recent patients also mainly damage their lungs, which are not other organs. Qiu also said that the virus strain detected in the Northeast cases could be imported from abroad.

Although China has prevented the outbreak of disease in most locations across the country, there have been new disease clusters discovered in recent weeks in the northeastern border provinces of Jilin and Heilongjiang.

Although Qiu did not specify where the strain of the virus could originate, both Jilin and Heilongjiang regions border Russia, according to Sputnik.

The cities of Jilin and Shu Lan, both located in Jilin Province, were frozen in the past week. Chinese President Xi Jinping said measures must be taken to prevent the revival of the disease in Jilin.

On Wednesday (May 20), China reported 5 more new cases of COVID-19. 4 of them are local spread, 1 was introduced by tourists.

The corona virus first appeared in Wuhan in December last year. It has infected more than 82,000 people in China and killed nearly 5,000 people.

According to the latest data from Worldometer, this virus has spread to 5 million people worldwide , killing more than 331,000.