in the form of bus omicron As the wave may break across America, word comes from another version of the more permeable version, dubbed BA.2, It is nicknamed by some the “stealth omicron”, as it appears to have escaped recognition better than its predecessor.
While the other new variants which looked worrying – like mu or lambda – has had little impact and details are still unclear, with early indications that BA.2 is also spreading to countries where the original Omicron lineage, BA.1, is dominant.
in Denmark, a country whose covid Policies are often compared to those of the US, with BA.2 now accounting for nearly half of indexed test samples. in the last week of december statistics From the Statens Serum Institute under the auspices of the Danish Ministry of Health, the subvariant accounted for 20% of all COVID cases in Denmark. By the second week of January, its share had risen to around 45% of the total.
“During the same period, the relative frequency of BA.1 declined,” according to a statement from the institute. “BA.1 and BA.2 have many differences in their mutations in the most important regions. In fact, the difference between BA.1 and BA.2 is greater than the difference between the original version and the alpha version.”
According to SSI, a preliminary analysis of BA.2 examples in the country “shows no difference in hospitalization”. It is also unclear how effective current vaccines are against the subvariant.
BA.2 “One is designated” version under investigation“By the UK Health Protection Agency. The new version of Omicron was first detected in the UK on 6 December 2021, according to an HSA. report good. To date, there have been 426 confirmed cases, with the highest concentration centered around London.
The report states, “Preliminary analysis suggests an increase in the growth rate compared to BA.1, however, the growth rate at the beginning of the emergence of a variant has a low level of certainty and requires further analysis.” “
Those reports may be inaccurate, however, since UK officials suspect the branch may be hard to identify, as it does not display a telltale sign in PCR tests that often points to omicrons. While a PCR test will still come up with a normal positive, such samples will need to be sequenced genomically, a much more expensive and time-consuming process that is less common, to identify the specific variant involved.
“Omicron ba.2 lacks a genetic deletion on the spike protein that produces S-gene targeting failure (SGTF) in some polymerase chain reaction (PCR) tests, which has previously been used as a proxy for omicron cases.” ,” the UK document reads.
#OmicronVariant The sub-lineage known as BA.2 is designated as a variant under investigation. The number of BA.2 cases is currently low, with the original Omicron lineage, BA.1, still predominant in the UK and further analyzes will now be carried out. https://t.co/254m2rwJN5
— UK Health Protection Agency (@UKHSA) 21 January 2022
,[I] The likely scenario seems to be BA.2 escalating to national omicron status,” said Tom Peacock, a virologist at Imperial College London.
BA.2 has protein differences from BA.1, potentially dozens, such as Estimated by Mayur. See attached chart from South African health authorities for general knowledge.
It has also been found in America, According to Sinclair Broadcasting’s Seattle station, KOMO News, which reports to the Washington State Department of Health, has confirmed two cases of BA.2 that were “detected earlier this month.”
“It’s too early to tell if we’re going to see more cases like this,” WA Health Department spokeswoman Shelby Anderson told the outlet. “So far, there have been fewer than 100 confirmed BA.2 cases in the US.”
There have been at least three cases found it At Methodist Hospital in Houston, where genomic sequencing is more robust than elsewhere.
An anonymous Biden administration official, however, said The Washington Post said Monday that “Omicron has concerns about the BA.2 version.” Due to the rise in cases overseas, the man said the US is gearing up and “paying close attention to the BA.2 version.” ,