'Deltacron' a lab contamination, not a new variant: UK virologist

Omicron has likely not circulated for long enough to produce a true recombinant. True recombinants don't tend to appear until a few weeks/months after there's been substantial co-circulation

'Deltacron' a lab contamination, not a new variant: UK virologist
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After a scientist in Cyprus claimed that his team has identified a new Covid variant being dubbed as 'Deltacron', a UK-based virologist has termed it a "lab contamination" and not a new strain.

Tom Peacock, a virologist at the Imperial College London, said that the Cypriot 'Deltacron' sequences reported by several large media outlets look to be quite clearly "contaminated".

"When new variants come through sequencing lab contamination isn't that uncommon (very very tiny volumes of liquid can cause this) - just usually these fairly clearly contaminated sequences are not reported by major media outlets," Peacock said in a Twitter thread on Sunday.

According to him, Omicron has likely not circulated for long enough, in a large enough population, to produce a true recombinant.

True recombinants don't tend to appear until a few weeks/months after there's been substantial co-circulation.

"We're only a couple of weeks into Omicron - I really doubt there are any prevalent recombinants yet," he said.

The World Health Organisation (WHO) has not commented on this development yet.

The genetic details of 'Deltacron' published on the GISAID database also do not resemble a recombinant.

Earlier, Leondios Kostrikis, the head of the laboratory of biotechnology and molecular virology at the University of Cyprus, claimed that his team has detected a new variant "Deltacron" in 25 people.


According to Kostrikis, of the 25 samples taken in Cyprus, 11 were hospitalised due to the virus, while 14 were from the general population.

However, the new variant was not something to worry about at the moment, Cyprus Health Minister Michalis Hadjipandelas was quoted as saying.

It is "quite possible" that the new strain has not been found elsewhere, and the sequences of the cases have been sent to GISAID, an open access database that tracks developments in the coronavirus, the Cyprus Mail reported.

Molecular biologist Eric Topol of the Scripps Research Translational Institute, tweeted: "Deltacron is a scariant. One less thing to worry about."

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