After Omicron, the delta recombinant variant, the World Health Organization (WHO) has now warned of the second COVID mutant strain XE (hybrid strain of the 2nd Omicron subvariant), saying that preliminary studies indicate that the comparison of BA Its growth rate in profit is ~10%. 2. So far, three hybrid or recombinant viruses have been detected – xd, xe, xf – (two are combinations of delta and omicron and the third is a hybrid strain of 2 omicron subvariants).
Which are the 3 newly identified recombinant strains?
A study by the UK Health Protection Agency (UKHSA) Recently it has been learned that currently 3 hybrid COVID variants are running. There are two different combinations of Delta and BA.1 XD and XF. The third one is EXE.
XD is the new name for the French Delta x BA.1 lineage. It contains the spike protein of BA.1 and the rest of the genome of Delta. It currently consists of as many as 10 sequences.
The XF is a UK Delta x BA.1 Lineage. It contains the spike and structural proteins from BA.1 but the 5′ portion of its genome from the delta. It currently includes several tens of sequences.
XE is a large UK BA.1 x BA.2 ancestry. It contains the spike and structural proteins from BA.2 but the 5′ portion of its genome from BA.1. It currently contains several hundred sequences.
After Omicron, Delta Recombinant, WHO Warns XE…
The World Health Organization yesterday released a report about XE with some preliminary findings, reports said.
The WHO document reads, “The XE recombinant was first detected in the United Kingdom on 19 January and >600 sequences have been reported and confirmed.” “Early day estimates indicate a community growth rate advantage of ~10% compared to BA.2, although this finding requires further confirmation.”
Earlier, the United Nations health agency issued a warning against Omicron, Delta recombinant virus, saying that both Omicron and Delta spreading widespread was highly expected.
Which is the most serious among XD, XE and XF?
Eminent virologist Tom Peacock explained that recombinants that contain the spike and structural proteins from the same virus (such as XE or XF) are very likely to function similarly to the parent virus.
XD Maybe a little more concerning. It has been found in Germany, the Netherlands and Denmark and contains structural proteins from Delta – if any of these recombinants act in a very different way than its parent it may be XD.
He said in a series of tweets, all of these recombinants (including small groups that have not been assigned) apparently should be closely monitored for signs of development and an effort to isolate and characterize them where possible. should be done.
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