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WHO calls special meeting to discuss new Covid variant from South Africa with ‘a large number of mutations’

RT: Maria Van Kerkhove, Head a.i. Emerging Diseases and Zoonosis at the World Health Organization (WHO), speaks during a news conference on the situation of the coronavirus at the United Nations in Geneva, Switzerland, January 29, 2020.

Denis Balibouse | Reuters

The World Health Organization is monitoring a new variant with numerous mutations to the spike protein, scheduling a special meeting Friday to discuss what it may mean for vaccines and treatments, officials said Thursday.

The variant, called B.1.1.529, has been detected in South Africa in small numbers, according to the WHO.

“We don’t know very much about this yet. What we do know is that this variant has a large number of mutations. And the concern is that when you have so many mutations, it can have an impact on how the virus behaves,” Dr. Maria Van Kerkhove, WHO’s technical lead on Covid-19, said in a Q&A that was livestreamed on the organization’s social media channels.

The monitoring of the new variant comes as Covid cases surge around the world heading into the holiday season, with the WHO reporting hot spots in all regions and particularly in Europe.

South African scientists have detected more than 30 mutations to the spike protein, the part of the virus that binds to cells in the body, South African scientist Tulio de Oliveira said in a media briefing hosted by the South Africa Department of Health on Thursday.

The B.1.1.529 variant contains multiple mutations associated with increased antibody resistance, which may reduce the effectiveness of vaccines, along with mutations that generally make it more contagious, according to slides he presented at the briefing. Other mutations in the new variant haven’t been seen until now, so scientists don’t yet know whether they are significant or will change how the virus behaves, according to the presentation.

The variant has also been detected in Botswana and Hong Kong, Joe Phaahla, minister of health of South Africa, said during the briefing. 

“Right now, researchers are getting together to understand where these mutations are in the spike protein and the furin cleavage site, and what that potentially may mean for our diagnostics or therapeutics and our vaccines,” Van Kerkhove said. She said there are fewer than 100 full genome sequences of the new mutation.

The virus evolution working group will decide if B.1.1.529 will become a variant of interest or a variant of concern, after which the WHO would assign the variant a Greek name, Van Kerkhove said.

“It’s really important that there are no knee-jerk responses here, especially with relation to South Africa,” Dr. Mike Ryan, executive director of the WHO’s emergencies program, said.

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