Coronavirus strains from California, UK grapple for dominance

Coronavirus strains from California, UK grapple for dominance

The grim horse race that represents the US COVID-19 pandemic has been reduced to a competition between two stubborn strains of Coronavirus: A The original California variant And the Import from UK.

New data released by the Centers for Disease Control and Prevention indicates that the California strain made up 13% of all coronavirus samples tested. Genetic sequencing as part of a new federal program In late February. An additional 7% of specimens were strain from the United Kingdom

Both versions of the virus have scientists and health officials on edge because they spread more easily than their predecessors and appear to be less vulnerable to some of the drugs used to treat COVID-19. The California strain has also shown signs of resistance to the current crop of COVID-19 vaccines.

In fact, studies have found that it is 20% more transmissible than other variants in wide circulation. Its enhanced transmissibility, ability to shorten the efficacy of treatments, and the ability to influence the effects of the vaccine prompted the CDC this week to declare the local strain a “kind of concern.”

Known to scientists as B.1.427 / B.1.429, it exploded in California throughout the fall and early winter as the state grappled with a fatal increase in the holidays. It now predominates in its home state and two of its neighbors. As of mid-February, she was responsible 52% of sequenced samples are from California, CDC data shows 41% of samples are from Nevada and 25% of samples are from Arizona.

But the UK breed gives it a chance to get its money – with an expected impact that ranges from uncertain to highly disturbing.

READ  The Russian-Chinese lunar exploration agreement highlights Moscow's split from the United States

In January, researchers at the CDC predicted that the UK variant Will become dominant In the US by March. Epidemiologist Summer Galloway The lead author of this report said on Wednesday that it probably accounts for 20% to 30% of the samples being sequenced today.

Galloway said the CDC does not have an equivalent estimate of the prevalence of the California variant.

What the genetic sequence data show is that the British variant, known as B.1.1.7, is making progress across the country and has resulted in a few local outbreaks. Its documented presence grew from 76 cases in 12 states in early January to 4,686 cases in all 50 states and the District of Columbia by late February.

Variable B.1.1.7 is thought to be up to 50% more transmissible than other widely spread variants, and a study published this week in the journal Nature indicates that 61% more likely to cause serious illness Or death.

The possibility that it can Another leadership Wave Of infections in the United States prompted vigorous efforts to expand vaccinations.

However, at the same time, many state governors are relaxing restrictions on wearing masks, eating at restaurants and attending large gatherings.

The new CDC results prompted Dr. Eric Topol, Director of the Scripps Research Translational Institute in La Jolla, to announce that the California variable is “on the way out.”

The fact that the UK has a higher rate of variant transmission than the California breed, he said, means the latter will “be quickly crowded out by B.1.1.7”. In the competition for population dominance, “spread the rules.”

READ  China discovers an "unusual" fragment on the far side of the moon

Tobol said that two other variables – one identified in South Africa (called B.1.351) and the other in Brazil (P.1) are likely to meet the same fate “because they do not carry an enhanced propagation capacity as B.1.1.7.”

Galloway said that neither the South African nor the Brazilian alternative has gained much a foothold in the United States. While both have also been classified as “variables of concern,” neither has accounted for more than 0.05% of the genetically analyzed coronavirus cases in the country since January.

But in Minnesota, Michigan and Florida, sudden explosions of new cases involving the British alternative have created new challenges for public health officials who are struggling to end the epidemic with massive vaccination campaigns. These outbreaks indicate that estimates of greater susceptibility to B.1.1.7 virus transmission have not been overestimated.

In Ionia, Michigan, the alternative was the heart of a major outbreak at Bellamy Creek Correctional Facility, where 1,600 inmates were incarcerated.

On February 9, state officials acknowledged the outbreak as 80 inmates appeared to have been infected by a single staff member. By Wednesday, even after the facility adopted an extensive testing program, personal protective equipment and movement restrictions, the number of injured had risen to 425 inmates and 26 employees, said Chris Goetz, a spokesman for the Michigan Department of Corrections.

All of them were infected with the UK type, Goetz said.

In Minnesota, an outbreak of the disease that emerged in the United Kingdom has brought nearly all youth sports to a halt in Carver County and put the state on alert as it reopens through a range of activities.

READ  Are teenage "dictators" outperforming other dinosaurs?

On January 9, the state noticed five cases in the southwest corner. Just over two months later, the state detected more than 250 cases in more than two dozen counties across the state. Carver County recorded an overall weekly growth of 80% cases from February to March.

In addition to being more contagious, the strain has also been associated with a higher death rate, “particularly among the elderly and people with underlying conditions.” Dr.. Ruth Linfield State epidemiologist and medical director at the Minnesota Department of Health.

The Minnesota experience with the B.1.1.7 variant raised concerns about another trait of it: its apparent ability to spread and infect children and young adults more easily than other breeds. In Minnesota, a third of all new cases are seen in people under the age of 20.

This pattern has been documented by scientists elsewhere, but has received less attention.

“What we saw really fits into this picture of you being so contagious,” Linfield said. We’ve been seeing it among young athletes and schools. And when we looked at the teams, they really had a high attack rate. “

We will be happy to hear your thoughts

Leave a reply

PBGOSSIPTV.COM È PARTECIPANTE AL PROGRAMMA ASSOCIATI DI AMAZON SERVICES LLC, UN PROGRAMMA DI PUBBLICITÀ AFFILIATO PROGETTATO PER FORNIRE AI SITI UN MEZZO PER GUADAGNARE TASSE PUBBLICITARIE IN E IN CONNESSIONE CON AMAZON.IT. AMAZON, IL LOGO AMAZON, AMAZONSUPPLY E IL LOGO AMAZONSUPPLY SONO MARCHI DI AMAZON.IT, INC. O LE SUE AFFILIATE. COME ASSOCIATO DI AMAZON, GUADAGNIAMO COMMISSIONI AFFILIATE SUGLI ACQUISTI IDONEI. GRAZIE, AMAZON PER AIUTARCI A PAGARE LE NOSTRE TARIFFE DEL SITO! TUTTE LE IMMAGINI DEL PRODOTTO SONO DI PROPRIETÀ DI AMAZON.IT E DEI SUOI ​​VENDITORI.
pbgossiptv.com