WHO consultants study Omicron XBB and BQ.1 sub variants

WHO consultants study Omicron XBB and BQ.1 sub variants

After meeting earlier this week to review Omicron’s developments, the WHO’s SARS-CoV-2 Virus Development Advisory Group postponed designating XBB and BQ.1 substrains as variants of concern.

in Advertising The group said yesterday that it would regularly reassess the situation. The group’s announcement comes at a time when BQ.1 ratios are rising rapidly in Europe and the United States.

Risk of reinfection, but no sign of increased severity

The WHO advisory group said that XBB and BQ.1 currently do not diverge sufficiently from each other or from other Omicron strains that have additional immune escape mutations to justify a worrisome different nomenclature or new nomenclature. “The two sublines are still part of Omicron, which remains a different kind of concern,” the group said.

To date, XBB – one of the BA.2.10.1 and BA.2.75 sub variants – has been detected in 35 countries and has a global prevalence of 1.3%. The group said that XBB has not been consistently linked to an increase in new infections, but added that early evidence suggests a higher risk of reinfection, especially for people infected before the Omicron variant began circulating. XBB’s ability to drive new waves of infection may depend on both the size and timing of previous Omicron waves and COVID-19 vaccine coverage.

BQ.1 is a BA.5 variant, and BQ.1.1 has an additional mutation at a key antigen site. Among them, 65 countries have detected viruses, the global spread of which is 6%.

The WHO group said BQ.1 viruses have a growth advantage over other Omicron strains in many places, including Europe and the United States, which require close monitoring and may pose a greater risk of infection.

To date, there is no evidence of increased disease severity with XBB or BQ.1 viruses.

European cases are now declining

In a week Modernization Today, the European Center for Disease Prevention and Control (ECDC) said COVID cases and deaths decreased slightly last week, with hospitalization levels remaining stable. Infections in people 65 and older, which have been increasing over the past few weeks, are down 2%.

ECDC said it has reclassified BQ.1 as a variant of interest and that it represents a rapidly increasing proportion of variant discoveries in the European region.

Meanwhile, the UK Health Security Agency (HSA) He said yesterday that most of the indicators of the Corona virus declined last week compared to the previous week. Hospitalizations are still higher in people 85 or older.

Mary Ramsay, MBBS, director of public health programs at HSA, said the decline in COVID cases and hospitalizations is encouraging and indicates the success of the country’s fall promotion program, during which 10 million have already received their doses. However, she cautioned the public not to be satisfied, given that issues could quickly rise again throughout the winter.

US indices are stable, with BQ ratios rising.1

Updated variable proportions Estimates Today, the US Centers for Disease Control and Prevention (CDC) reports another consistent rise in BQ.1 and BQ.1.1, which together make up 27.1% of the substrains.

The proportion of BA.5 viruses continues to decline steadily and is now at 49.6%, down from 60.3% in the previous week. Zone 2, which includes New York, New Jersey, Puerto Rico, and the US Virgin Islands, has the highest percentage of BQ.1 and BQ.1.1 viruses.

Currently, cases in the United States have been slowly declining since July, with the average daily new cases in the United States averaging 7 days at 38,167 cases today, according to the Washington Post Keep track of. Deaths have remained stable since July, with a 7-day average of 461 new daily deaths today, according to Mail data.

To date, 22.8 million people have received an updated COVID booster dose, according to the Centers for Disease Control and Prevention. Latest data.

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