Covid: Most infectious variants as Omicron strain spikes again in UK cases

Leading UK scientists have warned that the country will see a new wave of COVID-19 as infections begin to appear thanks to two more omicron variants.

New data last week showed there was a 43 per cent increase in COVID-19 infections in the UK in the week following the Platinum Jubilee celebrations, with two new subreddits believed to be behind the sudden increase.

Additionally, around 1.4 million people in the UK had coronavirus in the week ending 11 June, up from around 990,000 a week earlier.

1.4 million people in the UK had coronavirus in the week ending 11 June

(PA Wire)

Speaking during a briefing by the Independent Scientific Advisory Group for Emergencies (Sage) in May, Professor Christina Pagel said: “The new wave is starting now.”

She said: “We will have a new wave of infections this month. Now the expectation is that it will not be as high as the previous two waves and may go lower. But we can’t trust that and somehow we can see more people getting infected. ,

Here are the most contagious COVID-19 types since the pandemic first started:

Original Virus:

The novel coronavirus SARS-CoV-2 first emerged in 2019 in Wuhan, China. By March 2021, COVID-19 had spread across the world, leading to national lockdowns and border closures as the world grapples with a global health pandemic.

Currently, there are about eleven variants that are being monitored, including the well-known alpha and delta versions.

But the only strain that currently poses a type of concern comes from the Omicron family. This means it is more contagious, can cause more severe disease, and may be less vulnerable to public health measures.


The alpha version was first detected in the UK and a variant of the concern in December 2020. As of December 2021, it was identified in 192 locations worldwide.

There are 17 mutations in the alpha variant compared to the original Wuhan strain.

Leading UK scientists have warned that a new wave of Kovid-19 will be seen in the country


It is about 1.5 times more transmissible than the earlier covid variants, and according to this the risk of death is about 1.6 times higher. bmj,


Originally identified in India in late 2020, the delta strain swept around the world and is thought to hit the UK in the autumn of 2021 with a third wave.

According to data analyzed by the ONS, the risk of death from COVID-19 was estimated to be 67 percent lower after Omicron infection compared to Delta – making Delta more lethal.

The risk of death from COVID-19 was estimated to be 67 percent lower after Omicron infection compared to Delta

(PA Wire)

a study by knife It also found that the delta variant may cause a greater health care burden than the alpha strain, as it reported that people in England had twice the risk of hospitalization with delta compared to alpha.


Omicron took its hold in the UK in late 2021, scuttling plans for Christmas and New Years.

It was first detected in southern Africa in November 2021 and now has several subtypes, two of which are currently worrying another wave.

In mid-May, the UK Health Protection Agency (UKHSA) extended the classification of the Covid-19 variants Omicron ba.4 and Omicron ba.5 to variants of concern. Prior to this, BA.2 – also known as Stealth Omicron – was the dominant version in the UK.

Omicron is more transmitted than the original virus first observed in Wuhan and Delta.

Its ability to evade immunity may be because more than 30 types of mutations occur on the virus’s spike protein that attaches itself to human cells.

However, the variant is generally mild compared to infections caused by the delta variant, although it can still cause severe infection and death.

At a SAGE conference in January, he cited analysis from Imperial College London, which suggests a 35–65 percent reduction in the risk of hospitalization for Omicron, when compared to the most recent one for those with Delta. Lehar who had two doses of the vaccine.

In addition, during the peak of the Omicron wave, researchers at Imperial found that the risk of re-infection with Omicron is 5.4 times higher than with the delta version.

Lisa Margakis, senior director of infection prevention at Johns Hopkins Hospital in Baltimore, said: “The Omicron edition is responsible for the biggest jump since 2019.

According to preliminary data from Kei Sato of the University of Tokyo and his colleagues, the new BA.4 and BA.5 strains have more dangerous alpha and delta variants than the earlier ones because they may have evolved to clear the infection of lung cells. ,

Whereas, the highly permeable native Omicron targeted the tissues of the upper respiratory tract, which is why the infection is mild in most people.


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