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Will omicron variant oust delta is a question facing virus scientists

The scientists who were among a network that was the first to sequence omicron are watching to see if the highly mutated coronavirus variant will dictate the course of the pandemic.

Will future strains stem from its lineage or will other variants crowd it out?
Initial findings in South Africa, where omicron is driving the country’s fourth wave of infections, show that the new variant is easily transmitted and has largely overtaken delta, which had abated after an intense third wave of infections in the middle of 2021.

Read the latest updates in our dedicated coronavirus section.

That means, at least in South Africa, omicron is likely to form the base from which new mutations emerge, said Richard Lessells, an infectious disease specialist at the KRISP genomics institute based in Durban.

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“The jury is still out on whether omicron takes over from delta in all parts of the world, Lessells said in an interview on Tuesday. “Or whether delta is still evolving in some way and then we see this kind of co-circulation.”
Omicron’s discovery was announced by Tulio de Oliveira, the head of Krisp, at a state-run press conference on Nov. 25.

Scientists including Lessells, a close colleague of de Oliveira, are conducting a number of tests in order to get a better grasp of omicron’s risks, and how significant they are will only be known in the coming weeks.

The other possibility is that like omicron, “something comes out of the blue somewhat that hasn’t descended from either of these variants, but that has different properties again and so these are all the things we have to we have to look out for,” he said.

In South Africa, where 70 percent or more of the country’s 60 million people are estimated to have been exposed to Covid-19 during the past 18 months and about 26 percent are fully vaccinated, omicron’s symptoms have been milder than earlier strains. That may not be the case in countries where the coronavirus has been less rampant.

This virus “just wants to survive, nothing else,” Lessells said. “So it’s evolving to continue surviving now in the context of populations with high levels of immunity. It’s virus evolution in action.”

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UAE reports 1,796 new COVID-19 cases, no deaths

The UAE announced 1,796 new COVID-19 cases on Saturday, the official Emirates News Agency reported.

This brings the current total active cases in the UAE to 17,551 and the total number of COVID-19 cases since the start of the pandemic to 949,384, according to data from the National Emergency Crisis and Disaster Management Authority (NCEMA).

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The cases were determined out of 232,943 tests in the last 24 hours.

No deaths from the virus were recorded on Saturday, maintaining the total deaths caused by COVID-19 to 2,317 in the UAE.

At least 1,727 patients recovered in the previous 24 hours, bringing the total COVID-19 recoveries to 929,516.

On June 13, the National Emergency Crisis and Disaster Management Authority (NCEMA) announced it would strictly enforce its mask rules – with penalties for those flouting the protocol – and announced it would tighten its rules on the Al Hosn green pass system amid rising coronavirus cases across the country.

NCEMA said that it has recently “monitored some behaviors that have become a danger to society and public health,” referring to people not adhering to COVID-19 precautionary and preventative measures and how it has “negatively” impacted recovery efforts.

“Negligence and recklessness in following precautionary measures, and failure in the societal role in maintaining public health and acquired immunity, has resulted in a rise in the number of infections and new waves of the virus,” the authority spokesman said in the briefing.

The authority reaffirmed the need to wear masks in closed public spaces, reiterating that it was mandatory and that not adhering to this rule would result in a fine of up to $816 (AED 3,000).

According to the World Health Organization, more than 4.1 million cases were reported globally in the last week.

It added, however, that the worldwide number of deaths remained relatively similar to the week before, at about 8,500, noting that COVID-related deaths increased in three regions: the Middle East, Southeast Asia and the Americas.

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Omicron-specific COVID-19 vaccines could increase protection as boosters: EMA

Coronavirus vaccines tweaked to include the omicron variant strain can improve protection when used as a booster, the European Medicines Agency and other global health regulators said on Friday.
Following a meeting on Thursday, the EMA said global regulators had agreed on key principles for updating COVID-19 shots to respond to emerging variants.
While the existing coronavirus vaccines continue to provide good protection against hospitalization and death, the group said, vaccine effectiveness has taken a hit as the virus has evolved.
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As such, an omicron-specific or bivalent booster – meaning a vaccine that includes both the new strain and the original coronavirus strain – could “increase and extend” protection, a statement from the EMA said.
The statement refers specifically to the mRNA vaccines. Both Pfizer Inc and Moderna Inc have been testing retooled versions of their vaccines to include the omicron variant.
Vaccines which include other variants, for example the beta variant, might also be considered for use as boosters if clinical trial data demonstrate an adequate level of neutralization against omicron and other variants of concern, the statement said.
It follows guidance from the World Health Organization that omicron-specific boosters could restore protection against emerging strains of the coronavirus.
But it stops short of the position of the regulator in the United States, the Food and Drug Administration (FDA), which said on Thursday that it would seek the inclusion specifically of the newer BA.4 and BA.5 strains of omicron, currently driving a surge in new infections globally, in any new shots for use domestically.
On Tuesday, the head of a WHO advisory committee that has considered the modified shots said the group preferred BA.1-based boosters, arguing that the variant is more distinct and could generate a broader response than the more recently circulating subvariants.
Top US FDA official Peter Marks said in an interview that regulators from other countries were seriously considering using new boosters based on the BA.1 omicron variant that caused the massive surge in cases last winter, because those shots can be available sooner than the BA.4/5 based booster the United States plans to use.
The EMA said it would provide more details in coming days.
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Russia scraps remaining COVID-19 restrictions

Russia said on Friday it was ending all restrictions to combat the spread of COVID-19, including the requirement to wear masks, citing a steady decline in deaths from the virus.
However, it did not rule out re-introducing restrictive measures if the situation deteriorates.
Consumer watchdog Rospotrebnadzor said it was “suspending previously introduced restrictions, including the mask regime, a ban on public catering at night, and a number of other measures.”
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It said the dynamics of the virus were consistent with global trends and 93 percent of confirmed cases were mild or asymptomatic.
Since the start of the pandemic in Russia in April 2020, over 800,000 people have died from coronavirus or causes related to COVID-19, Reuters calculations show, with the country recording over 18 million infections.
Russia was quick to develop and launch its Sputnik V vaccine when the pandemic struck but take-up was slow, with many Russians citing distrust of the authorities and fear of new medical products. About 52 percent of the population has been fully vaccinated.
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