Â鶹ӰÊÓ

Skip to main content

Chinese study shows no new COVID-19 variants emerged from recent outbreak

Share
HONG KONG -

The world should "calm down" about the possibility of new COVID-19 variants circulating in China, leading Chinese scientist George Gao said.

A paper by Gao and colleagues published in the Lancet medical journal on Wednesday showed that no new variants had emerged in the initial weeks of China's recent outbreak, after the end of its zero-COVID policy saw a huge wave of cases.

"The world should completely calm down from the fear that there are new variants or special variants circulating [in China]," Gao, professor at the Institute of Microbiology at the Chinese Academy of Sciences and former head of the Chinese Center for Disease Control and Prevention (CDC), told Reuters.

The variants causing infections in China were the same Omicron sub-variants - BA.5.2 and BF.7 - seen elsewhere in the world, he said by email.

The study analyzed 413 new COVID-19 cases in Beijing from Nov. 14 to Dec. 20, 2022 and found all were likely caused by existing strains. It found that 90 per cent of the majority-locally acquired infections were due to the above two sub-variants.

The findings are representative of the entire country, the authors said, citing the characteristics of Beijing's population and circulation of highly transmissible COVID-19 strains.

China ended more than three years of a stringent zero-COVID policy involving city-wide lockdowns, mass testing and extensive quarantine in December, which was followed by a wave of infections across its 1.4 billion population.

A prominent government scientist said on Jan. 21 that 80 per cent of people had been infected already and China's CDC has said repeatedly in the past month that continuous monitoring showed no new strains of COVID-19 have been found.

Many countries put in place COVID-19 testing requirements for Chinese travellers in the wake of its large outbreak, citing concerns that new variants could emerge and a lack of data, though China has said the measures are not justified.

Gao said China was continuing widespread viral genomic sequencing, and would identify any new variants if they emerged.

He said cases were currently declining, but "a new wave is possible in the future."

The Chinese-funded study in the Lancet was conducted by researchers from the Beijing Center for Disease Prevention and Control, Chinese Academy of Sciences, CDC and University of Chinese Academy of Sciences.

The authors said there were some limitations to the study, including China's decision to end large-scale mandatory testing.

CTVNews.ca Top Stories

The British Columbia election campaign is set to officially start today, with Lt.-Gov. Janet Austin issuing the writ for the Oct. 19 vote.

A northern Ontario man is facing a $12,000 fine after illegally shooting a moose near the Batchawan River.

Unusual flippered feet are making their way into the Saint Lawrence River this weekend. Led by underwater explorer and filmmaker Nathalie Lasselin, volunteer divers are combing the riverbed near Beauharnois in Montérégie to remove hundreds of tires that have been polluting the aquatic environment for decades.

A sea lion swam free after a rescue team disentangled it near Vancouver Island earlier this week.

Local Spotlight

Cole Haas is more than just an avid fan of the F.W. Johnson Wildcats football team. He's a fixture on the sidelines, a source of encouragement, and a beloved member of the team.

Getting a photograph of a rainbow? Common. Getting a photo of a lightning strike? Rare. Getting a photo of both at the same time? Extremely rare, but it happened to a Manitoba photographer this week.

An anonymous business owner paid off the mortgage for a New Brunswick not-for-profit.

They say a dog is a man’s best friend. In the case of Darren Cropper, from Bonfield, Ont., his three-year-old Siberian husky and golden retriever mix named Bear literally saved his life.

A growing group of brides and wedding photographers from across the province say they have been taken for tens of thousands of dollars by a Barrie, Ont. wedding photographer.

Paleontologists from the Royal B.C. Museum have uncovered "a trove of extraordinary fossils" high in the mountains of northern B.C., the museum announced Thursday.

The search for a missing ancient 28-year-old chocolate donkey ended with a tragic discovery Wednesday.

The Royal Canadian Mounted Police is celebrating an important milestone in the organization's history: 50 years since the first women joined the force.

It's been a whirlwind of joyful events for a northern Ontario couple who just welcomed a baby into their family and won the $70 million Lotto Max jackpot last month.

Stay Connected