Are Omicron Variants Better at Escaping Vaccine Protection?


“The virus is continuing to evolve, as expected, and it is not surprising that these new, more transmissible subvariants are becoming more dominant around the world,” says Ho. “Understanding how currently available vaccines and antibody treatments stand up to the new subvariants is critical to developing strategies to prevent severe disease, hospitalizations, and deaths—if not infection.”

In laboratory experiments, Ho and his workforce studied the power of antibodies from people who obtained no less than three doses of an mRNA vaccine, or acquired two pictures and had been then contaminated with omicron, to neutralize the brand new subvariants. (Ho’s workforce didn’t take a look at people who had not obtained a booster shot, as a result of a earlier research discovered that two doses present little safety towards an infection by earlier omicron variants.)

Omicron Subvariants: New Insights

The research revealed that whereas BA.2.12.1 is simply modestly extra resistant than BA.2 in people who had been vaccinated and boosted, BA.4/5 was no less than 4 instances extra resistant than its predecessor.


As well as, the scientists examined the power of 19 monoclonal antibody therapies to neutralize the variants and located that solely one of many accessible antibody therapies remained extremely efficient towards each BA.2.12.1 and BA.4/5.

“Our study suggests that as these highly transmissible subvariants continue to expand around the globe, they will lead to more breakthrough infections in people who are vaccinated and boosted with currently available mRNA vaccines,” Ho says. Although the present research means that the brand new variants might trigger extra infections in vaccinated people, the vaccines proceed to supply good safety towards extreme illness.

Supply: Eurekalert


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