A single mutation of the Covid-19 virus has made a variant of this virus much more contagious and has now allowed it to dominate around the world, several teams of researchers in the United States and Europe have announced.
In May, an Anglo-American team of researchers discovered that a variant of the virus carrying the D614G mutation was taking over all other forms of the virus in the world.
Its meteoric progress can be seen on the Gisaid virus monitoring platform, an international database that collects in real time the hundreds of virus sequences transmitted every day by researchers around the world, on a model already in place for viruses of influenza.
Detected in January in Germany, this variant of the virus has broken through in all countries and is now found to be the majority worldwide with a few exceptions.
This replacement reflects an optimization of this form of the virus in our species, after the one that allowed
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