Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, testifies at a hearing of the Senate Health, Education and Labor Pensions Committee held at the US Capitol on May 11, 2021.
Jim Lo Skalzo | Pool | Reuters
US health officials are paying attention to a new Covid-19 subvariant called “Delta Plus.” Some scientists say it may be more contagious than the already infectious delta variants.
Delta Plus, officially known as AY.4.2, contains two new mutations to the spek protein, A222V and Y145H, which allow the virus to enter the body. Since these mutations have been found in other Covid mutants, it is unclear how dramatic these changes will affect the virus.
François Barrow, director of the Institute of Genetics at University College London, Contagiousness is 10% to 15% According to the Centers for Disease Control and Prevention, more than Delta, which first appeared in India and spreads more easily than Ebola, SARS, MERS, and the 1918 Spanish flu.
According to CDC director Dr. Rochelle Walensky, Delta’s R-naught or fertility is 8 or 9, which means that everyone with Covid will spread it to up to 9 others. To do. Covid’s “wild-type” or original strain had an estimated R-naught of about 3. People infected with the delta mutant have 1,000 times the viral load of the original Covid strain.
Ministry of Health of India Reported in June He added that the Delta Plus is more contagious than the Delta Variant, and that subtypes bind more strongly to lung cell receptors and may even reduce the effectiveness of monoclonal antibody therapy.
The mutation was detected in the United States, but there was no noticeable increase in DeltaPlus cases across the country, Warrensky said in a Whitehouse Covid briefing Wednesday.
“In particular, we are monitoring sub-strains that may affect treatments such as monoclonal antibodies and vaccines,” Warensky said. “At this time, there is no evidence that subline AY.4.2 affects the efficacy of current vaccines or treatments.”
The AY.4.2 subvariant has been detected in at least 5 cases in the United States since August. Washington DC, California, North Carolina, Massachusetts, Washington. Outbreak.info.. This website collects data from GISAID, a global genomic database of Covid and influenza cases.
Leading health authorities are fueled by billions of people around the world who remain unvaccinated, resulting in stronger and potentially vaccine-resistant Covid mutants as long as widespread outbreaks continue to occur. I’ve been warning you for a few weeks that it’s possible.Dr. Anthony Fauci, Chief Medical Advisor of the White House Said in august If another mutation crosses the delta, the U.S. could be “problematic” and to unvaccinated people this summer in hopes of curbing the surge that disrupted the U.S. health system. I asked for a shot.
DeltaPlus could also ultimately affect the age group eligible to receive Covid booster doses, said Dr. Peter Marks, a major Vaccine Regulator of the Food and Drug Administration, Wednesday night. rice field. The FDA and CDC have licensed Covid boosters for a variety of adults in the United States from all three US manufacturers. Modana, Johnson & Johnson When Pfizer..
“The exact age is based on what we see about the new situation, which is currently very dynamic as reports of new variants continue to be seen,” Marks said. increase. “Also, there are now changes in the epidemiology of Covid-19 in our country, and new hotspots are emerging as certain locations decline.”
Concerns about Delta Plus are rising in the UK, where authorities are fighting a surge in incidents and facing a new health crisis. According to the latest data from the National Security Agency, DeltaPlus cases accounted for approximately 6% of all Covid cases sequenced as of the week beginning September 27.In the UK, sublineage is “increasingly frequent,” officials said, and doctors from the National Health Service Federation in London said. I’m asking for a return To the stricter Covid protocol towards winter.
But global health leaders are calling on the public not to panic. The emergence of Covid subtypes is not the same as the evolving entirely new variant, but tracking the progression of the delta may help the medical community better understand mutations, the World Health Organization said. Dr. Sylvain Aldighieri, Covid-19 Incident Manager The regional branch of the Americas said at a briefing on October 6.
“Looking at these additional changes may help researchers track variants in detail,” says Aldighieri. “But they do not mean a functional or biological difference.”
— CNBC’s Holly Ellyatt in London contributed to this report.
U.S. officials are watching carefully for the “Delta Plus” mutation to spread to the UK
Source link U.S. officials are watching carefully for the “Delta Plus” mutation to spread to the UK