Studies have found a large number of recent cases of Ami kerong in England or re-infection

BEIJING, Jan. 28 (Xinhua) -- A study released on January 26 found that about two-thirds of those who recently tested positive for the new crown virus in the United Kingdom and England said they had previously been diagnosed or suspected of being infected with the new crown virus.

Imperial College London analysed more than 100,000 nucleic acid test samples taken in England between the 5th and 20th of this month and found around 4,000 confirmed cases. Among them, of the nearly 3,600 confirmed cases that responded to the survey, 64.6% claimed to have been previously confirmed to be infected with the new crown virus. Another 7.5 percent suspected they had been infected but were not tested at the time.

People walk in Covent Garden, London, England, on Jan. 19. (Xinhua News Agency, photo by Stephen Cheng)

However, according to the online edition of the US "Capitol Hill" daily newspaper, researchers believe that some test-positive cases may be re-infection, and some may be only a single infection, but there is still residual virus in the body during the recent test.

The Imperial College Research institute found that 99% of the positive samples from the 5th to the 20th were infected with the Olmiqueron strain and 1% with the Delta strain. The researchers said the outbreak in England was unprecedented in January, with "the Olmiqueron strain almost completely replacing the Delta strain".

Imperial College has been analyzing the epidemic data every month since May 2020 and found that the positive detection rate of the new crown virus reached 4.41% in January this year, a record, three times that of last December.

Researchers believe that covid-19 vaccination is still the main way to prevent infection with covid-19 and can effectively prevent hospitalization after infection. (Chen Dan)