The new coronavirus variant is the most significant scientists have discovered so far, a top UK health official says.
Scientists fear the variant – known as B.1.1.529 – could be more transmissible and better able to evade vaccines.
Jenny Harries, the chief executive of the UK’s Health Security Agency (UKHSA) says: “This is the most significant variant we have encountered to date and urgent research is underway to learn more about its transmissibility, severity and vaccine-susceptibility.”
She says scientists are looking into “what public health actions may limit the impact of B.1.1.529”.
The UK is rushing in strict travel restrictions for South Africa and five neighbouring countries to halt the spread of the new strain.
So, what do we know?
The variant is called B.1.1.529 and is likely to be given a Greek code-name (like the Alpha and Delta variants) by the World Health Organization on Friday.
It is also incredibly heavily mutated. Prof Tulio de Oliveira, the director of the Centre for Epidemic Response and Innovation in South Africa, said there was an “unusual constellation of mutations” and that it was “very different” to other variants that have circulated.
“This variant did surprise us, it has a big jump on evolution [and] many more mutations that we expected,” he said.
In a media briefing Prof de Oliveira said there were 50 mutations overall and more than 30 on the spike protein, which is the target of most vaccines and the key the virus uses to unlock the doorway into our body’s cells.
Zooming in even further to the receptor binding domain (that’s the part of the virus that makes first contact with our body’s cells), it has 10 mutations compared to just two for the Delta variant that swept the world.
This level of mutation has most likely come from a single patient who was unable to beat the virus.
A lot of mutation doesn’t automatically mean: bad. It is important to know what those mutations are actually doing.
But the concern is this virus is now radically different to the original that emerged in Wuhan, China. That means vaccines, which were designed using the original strain, may not be as effective.
Some of the mutations have been seen before in other variants, which gives some insight their likely role in this variant.
For example N501Y seems to make it easier for a coronavirus to spread. There are others in there that make it harder for antibodies to recognise the virus and might make vaccines less effective, but there are others that are completely new.
Prof Richard Lessells, from the University of KwaZulu-Natal in South Africa, said: “They give us concern this virus might have enhanced transmissibility, enhanced ability to spread from person to person, but might also be able to get around parts of the immune system.”
There have been many examples of variants that have seemed scary on paper, but came to nothing. The Beta variant was at the top of people’s concerns at the beginning of the year because it was the best at escaping the immune system. But in the end it was the faster-spreading Delta that took over the world.
Source : https://www.kbc.co.ke/new-covid-variant-is-most-significant-seen-so-far/647