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Meanwhile, the name delta comes from the WHO system, which aims to simplify genomics for the general public. Give names to related sample partners if they think they may be of special interest. There are currently eight families with Greek letters, but until a new subline of the first delta tension proves that they behave differently from their parents, the WHO believes they are all delta.
“Delta plus” takes the WHO designation and mixes it with information from the Pango lineage. It does not mean that the virus is more dangerous or more worrying.
“People get pretty worried when they see Pango’s new name. But we shouldn’t be upset to find new variants. Constantly, new variants appear without different behavior, “says Brito.” If we prove that a new lineage is more threatening, the WHO will give it a new name. “
Evolution monitoring
“For a genomic scientist like me, I want to know what variation we’re seeing,” says Kelsey Flower, a genomics and data scientist at the Wisconsin state public health lab. “For a larger audience, it doesn’t really change. Classifying all of them as deltas is enough to communicate with policy makers, public health, and citizens.”
Basically, the evolution of viruses is of any other kind. As the virus spreads throughout the body, it makes its own copies, often with minor errors and changes. Most of them are dead, but from time to time, a copy made with a mistake repeats itself enough to spread inside someone else to someone else.
This week, scientists divided the “children” in the delta into 12 families to better track small-scale local changes. This does not mean that the virus itself has suddenly changed.
As the virus spreads from person to person, it accumulates these small changes, allowing scientists to track transmission patterns in the same way they look at human genomes and identify which people are related. But in viruses, most of these genetic changes do not affect how they actually affect individuals and communities.
But genomics scientists still need a way to track the evolution of the virus, both in the basic sciences and to identify changes in behavior as soon as possible. This is why they observe delta patterns, especially since they are spreading very rapidly. The Pango group continues to divide the descendants of the first delta lineage, B.1.617.2, into subsections of related cases.
Until recently, he registered 617.2 himself, plus three “children,” named AY.1, AY.2, and AY.3. This week, the group decided to split these children into 12 families to better track small-scale local changes — of which a total of 13 delta variants. This does not mean that the virus itself has suddenly changed.
“Especially on the edges, with these emerging variants, you’re splitting your hair,” says Duncan MacCannell, a scientific officer in the CDC’s Office of Advanced Molecular Detection. “Depending on how these definitions are worked out and refined, hair can be distributed in different ways.”
What does it matter to the public?
It should be noted that not all variants with WHO nicknames are equally bad. It also adds a label that tells us how concerned we should be when the organization names a new family.
The lowest level is a variant of interest, which means that it is worth paying attention to; in the middle is a variant of concern, like a delta, which has clearly become more dangerous. Often, the variants of interest give this label because they share a mutation with the variants of concern — they are under surveillance.
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