Omicron variant might make COVID-19 vaccines less effective, WHO warns – National | Globalnews.ca

Preliminary evidence indicates that COVID-19 vaccines may be less effective against infection and transmission linked to the Omicron variant, which also carries a higher risk of reinfection, the World Health Organization said on Wednesday.

The WHO, in its weekly epidemiological update, said that more data was needed to better understand the extent to which Omicron may evade immunity derived from either vaccines or previous infection.

“As a result of this, the overall risk related to the new variant of concern Omicron remains very high,” it said, echoing comments made by WHO officials at an online briefing on Tuesday.

Read more:

Pfizer’s vaccine 70% effective against hospitalization from Omicron: study

For the first time since the dominant Delta variant was classified as a variant of concern in April, the percentage of Delta sequences registered on the GISAID global science database has declined this week compared with other variants of concern, it said.

Story continues below advertisement

The WHO added it needs to be interpreted with caution as countries may perform targeted sequencing for Omicron and therefore upload fewer sequences on all other variants, including Delta.

The Delta variant is still dominant, however, accounting for 99.2 per cent of the almost 880,000 sequences uploaded to GISAID with specimens collected in the last 60 days.


Click to play video: 'COVID-19: Prime minister meets with premiers over Omicron variant'







COVID-19: Prime minister meets with premiers over Omicron variant


COVID-19: Prime minister meets with premiers over Omicron variant

But the trend is declining in the proportion of Alpha, Beta and Gamma, and with the emergence of Omicron variant. Out of the total, some 3,755 – or 0.4 per cent – were Omicron and the other three variants of concern together numbered 401, less than 0.1 per cent each.

View link »





For all the latest world News Click Here 

Read original article here

Denial of responsibility! TechAI is an automatic aggregator around the global media. All the content are available free on Internet. We have just arranged it in one platform for educational purpose only. In each content, the hyperlink to the primary source is specified. All trademarks belong to their rightful owners, all materials to their authors. If you are the owner of the content and do not want us to publish your materials on our website, please contact us by email – [email protected]. The content will be deleted within 24 hours.