New Delta coronavirus subvariant AY.4.2


Experts are tracking a new mutation of the Delta variant of the coronavirus reported in dozens of countries.


Health officials and scientists are closely tracking a new mutation of the coronavirus amid concerns that it could be more transmissible than the original strain.

A subvariant of the Delta variant of the virus labelled AY.4.2 has been detected in dozens of countries, with the vast majority of cases being reported in the United Kingdom.

“An increase in AY. 4.2 sequence submissions has been observed since July,” the World Health Organization (WHO) said in its weekly epidemiological update this week.

It said that 93 percent of AY.4.2 cases were reported in the UK, where the strain was gradually contributing to a greater proportion of cases and accounted for about 5.9 percent of overall Delta cases reported there in the week beginning October 3.

“Epidemiological and laboratory studies are ongoing” to assess if there has been a change of transmissibility or a decrease in the effect of the antibodies to repel the virus, the United Nations health agency added.

The UK’s Health Security Agency (UKHSA) last week labelled AY.4.2 as a “variant under investigation,” but despite its spread, it has not yet been labelled as a “variant of concern”.

Here is what we know so far:

What is the new AY.4.2 strain?

The subvariant is an evolution of the highly transmissible Delta variant of the coronavirus. Scientists have found three mutations including two in the spike protein, the part of the virus that allows it to bind to and invade the body’s cells.

The new strain has been found in at least 42 countries, according to a WHO epidemiological update, including the UK, India, Israel, the United States and Russia.

The subvariant, which some have labelled as “Delta Plus,” contains changes that could give the virus survival advantages over other variants.

Previously, variants have fuelled new surges in coronavirus cases. The Alpha variant spread widely after it was discovered in the UK in late 2020, and the Delta variant has become the dominant strain of the virus worldwide since it was discovered in India in late 2020.

However, experts have noted that AY.4.2 has not become the dominant strain in the countries where it has been reported.

“Currently, the strain has been found in some other countries, but it is not becoming predominant,” Dr Roselyn Lemus-Martin, who holds a PhD in molecular and cell biology from the University of Oxford, told Al Jazeera.

“It’s possible that we see a situation similar to the Lambda strain … at the start, people were concerned but eventually its presence was diluted in places like the US or the UK,” she added.

Experts have also noted that similar mutations have been witnessed in other variants and other lineages of the Delta variant, without having a large effect on the virus.

The Delta variant remains “by far the most dominant variant in terms of global circulation”, Maria Van Kerkhove, the World Health Organization’s epidemiologist, said at a public session in early October.

“Delta is dominant, but Delta is evolving,” she said, adding that the more the virus circulates, the greater the chances it has to mutate.

3 thoughts on “New Delta coronavirus subvariant AY.4.2

  1. I have not checked in here for some time because I thought it was getting boring, but the last few posts are good quality so I guess I抣l add you back to my everyday bloglist. You deserve it my friend 🙂

  2. As I web-site possessor I believe the content material here is rattling great , appreciate it for your efforts. You should keep it up forever! Good Luck.

  3. There are certainly a number of particulars like that to take into consideration. That could be a great point to deliver up. I supply the thoughts above as common inspiration however clearly there are questions just like the one you carry up where the most important thing will probably be working in sincere good faith. I don?t know if greatest practices have emerged around issues like that, however I’m sure that your job is clearly identified as a good game. Both girls and boys really feel the impact of just a moment抯 pleasure, for the rest of their lives.

Leave a Reply

Your email address will not be published. Required fields are marked *

Previous post What Is An Online Business Manager, and Is It Time for You to Hire One?
Next post Tigrayan forces claim to capture the new town of Kombolcha