BA.2 Omicron Variant: What You Need to Know


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Another year, another variant. Even before the end of the Omicron wave Omicron Known as BA.2 raises concerns. Here’s what you know about BA.2.

What is BA.2?

It’s basically another flavor of Omicron that’s out there from the beginning.The term omicron is used to describe The entire family of variants This suddenly appeared in November 2021. Most Omicron cases are caused by one of these variants known to scientists as BA.1. BA.2 has 32 of the same mutations as BA.1, There are 28 different..The first BA.2 sample is Collected in South Africa on 17 November 2021..

Why are you listening to it now?

In some countries, including the United Kingdom, Germany, India and Denmark, the proportion of cases with BA.2 is increasing rapidly. In other words, BA.2 replaces BA.1 and suggests that it is more communicable.

Need to worry about BA.2?

If you have not been vaccinated and have not been infected with Omicron, you are. If infected, it can initiate a series of infections and lead to death, even if it does not become seriously ill. These risks are much lower if you are fully vaccinated and boosted, or if you already have Omicron.

If I already have Omicron, can I get infected with BA.2.

Although not yet known, many researchers expect that if they have recently been infected with BA.1, especially if they have been vaccinated, they are unlikely to be infected with BA.2. I’m not saying this won’t happen, but it’s expected to be low. “Antibodies induced by BA.1 probably respond fairly well to BA.2 and are far superior to delta antibodies,” he said. Jesse Bloom At the Fred Hutchinson Cancer Research Center in Seattle, Washington.

What if I have been vaccinated but not Omicron?

The Existing vaccine In fact, it has better protection from BA.2 than BA.1. Three vaccinations, according to the UK Health Security Agency It is 70% effective in preventing symptomatic infections caused by BA.2. Two weeks after the booster, 63 per valid against BA.1. For those who have been vaccinated twice, the efficacy after 25 weeks is 13% for BA.2 and 9% for BA.1. These are the total number of all vaccines used in the UK.

Will BA.2 cause yet another wave of incidents around the world?

Hopefully it will prolong the current Omicron wave in many countries. In South Africa, where the waves of Omicron are almost over No signs of resurrection Despite the high percentage of cases currently BA.2. “BA.2 will surprise you. Caused a big wave In the place where I just got BA.1. “Bloom says. However, in countries such as Japan, which have been very successful in preventing the spread of the SARS-CoV-2 coronavirus, you may find it even more difficult to control BA.2 than BA.1. In other words, there may be BA.2 waves in some countries.

Does this all mean that BA.2 is less dangerous than BA.1.

In fact, probably. Factors that determine the threat posed by a virus include the inherent severity of the virus, the number of people infected, and the degree of immune protection that those people have.As far as we know, BA.2 is unlikely anymore Causes severe illness Than BA.1, but May be 50% more contagious.. Highly contagious viruses, even if not severe, can infect more people and cause more hospitalizations and deaths. However, in many countries, most people are now immune to boosters and infections, which should significantly reduce both the number and severity of BA.2 infections.

Is BA.2 a “stealth variant”?

Some people claim that BA.2 is a “stealth variant” that is not detected in the test, but in fact it is detected in both. PCR and immunoflow (fast) tests Like all other variants.

The SARS-CoV-2 PCR test searches for three short sequences unique to the virus and gives a positive result if at least two are detected. One of the sequences is usually part of the peplomer gene or the S gene. BA.1 Omicron, like some previous variants, has a mutation that means no S gene sequence is detected, but the PCR test is still positive. This is called the S gene dropout.

Sequencing is usually the only way to detect variants, but by looking for dropouts of the S gene, many laboratories can see how BA.1 omicrons are inherited from the delta by PCR testing alone. I can do it. BA.2 did not cause dropout of the S gene and could not be distinguished from delta using PCR. Therefore, it is a misnomer of “stealth”. But now that the delta has almost disappeared in many places, it is not stealth, as the reduced proportion of S gene dropouts reveals the spread of BA.2.

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BA.2 Omicron Variant: What You Need to Know

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