Many people infected with Omicron had Covid-19

BrotherResearch by Imperial College London shows that nearly two-thirds of the 3,500 Omicron-positive people have had Covid-19 in the past.

Scientists also determined that Omicron completely replaced the Delta variant in the UK. The study has been updated monthly since May 2020, funded by the UK government. They analyzed more than 100,000 PCR tests across the country from January 5-20.

As a result, 99% of samples were positive for the Omicron variant, only 1% were infected with Delta. “The level of infection is unprecedented in the UK. Since January 2022, Omicron has almost completely replaced Delta”, the January 26 study indicated.

Nearly two-thirds (64.5%) of the more than 3,500 volunteers who tested positive for Omicron had previously had Covid-19. More than 7.5% said they had suspected nCoV infection, but did not get tested.

Initially, scientists thought that immunity from natural viral infections could prevent mutation. But after much research, they fear Omicron is an exception. British health authorities in December estimated the risk of re-infection with Omicron was 5.4 times greater than that of Delta. This makes the rate of nCoV infection in the UK unprecedentedly high.

“Vaccination (including booster doses) remains the mainstay of the anti-Covid-19 campaign. Vaccines can protect people from hospitalization and death. However, the community is recommended to take additional measures. alternative methods if infection rates remain high, although Omicrons are less likely to cause severe disease,” the team said.

People wear masks to prevent Covid-19 at Covent Garden Market in London, December 2021. Photo: AP

Omicron has appeared in at least 170 countries, causing a record increase in the number of new cases. On January 25, the director general of the World Health Organization (WHO) Tedros Adhanom Ghebreyesus, said the number of Omicron infections in the last nine weeks was higher than the number of Covid-19 cases in the whole of 2020.

According to research, the number of Covid-19 cases in the UK has decreased since the beginning of January, but remains high. One in 23 Britons has Covid-19. 4.4% of the new tests showed positive results, tripled compared to December. On January 26, the UK recorded more than 94,000 new nCoV infections, 439 deaths.

The UK will abolish most of its Covid-19 preventive measures on January 27. The public is not required to wear masks and work from home. Currently, nearly 85% of the country’s population over 12 years old has received two doses of the vaccine, and 64% has received three doses.

Thuc Linh (Follow CNBC)


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