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Omicron is trouncing the argument for “natural immunity” to COVID

posted onMarch 24, 2022
by l33tdawg
Arstechnica
Credit: Arstechnica

So-called "natural immunity" against COVID-19 has always been a dodgy argument for avoiding vaccination during the pandemic. But amid omicron, natural immunity is clearly rubbish.

Unvaccinated people who recover from an omicron coronavirus variant infection are left with paltry levels of neutralizing antibodies against omicron. They also have almost no neutralizing antibodies against any of five other coronavirus variants, including delta. People who were vaccinated before getting an omicron infection, however, have strong protection against all five variants, and they have some of the highest levels of neutralizing antibodies against omicron.

That's all according to a new study surveying neutralizing antibody profiles in people who have all recovered from an omicron infection, with or without pre-existing immunity. The study was published Wednesday in The New England Journal of Medicine by a team of Austrian researchers. The researchers were led by virologist Janine Kimpel of the Medical University of Innsbruck.

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