The risk of seeing a new pathogen come from nature and transmissible to humans is well understood by scientists. C’est pourquoi ils surveillent de près les divers viruses repérés à travers le monde.

Among them, a team from Washington State University’s Paul G. Allen School for Global Health has recently pointed out the potential nuisance of a virus belonging to the same family of coronaviruses – the sarbecoviruses.it is SARS-CoV-2.

In contrast to hundreds of sarbecoviruses discovered in the last years, mainly in Asia among the mice, Khosta-2, discovered in Russia, has disturbing characteristics.

Like SARS-CoV-2, it is able to use its spike belt to infect cells by attaching itself to a receptor called the angiotensin-converting enzyme 2, which is found in human cells », explicient les chercheurs américains.

Autre sujet de préoccupation: neither the serum of people vaccinated against Covid-19, nor that of infected patients, offers protection against this new virus.

The danger of association

“Heureusement, il manque à ce nouveau virus certains gènes nécessaires à la pathogenèse chez l’humain”, Indian Michael Letka, a virologist and the main author of the work. En d’autres termes, il ne disposerait pas de tout le necessaire pour déclencher, en l’état, une maladie dans notre organisme.

However, il n’y a pas de quoi se rassurer pour autant. Il existe un risque réel que ce virus se recombine, c’est-à-dire s’associe à celui du Covid-19, qui a développement tout ce qu’il fallait pour rendre malades les humains. Indeed, “le SARS-CoV-2 can return very well to nature and associate with a virus like Khosta-2 that has a potential to become an even more dangerous virus”, ajut-t-il.

This is why Michael Letko and his colleagues exhort à la Recherche de vaccines au plus large specter. “We have developers of universal vaccines to protect against sarbecavirus in general working on variants of SARS-CoV-2”, conclusion

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