The data from February 2022 showed the percentage of young children and adolescents who had the antibodies was even higher, reaching 75%.
France has confirmed only 25 cases of the new Omicron variant but officials say the number could jump significantly in the coming weeks.
And for the most part, that seems to hold true with omicron.
Market reactions Main article: Worry about the potential economic impact of the Omicron variant led to a drop in global markets on 26 November, including the worst drop of the in 2021, led by travel-related stocks.
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If half, or two-thirds, or whatever it is, of the immune response is not going to be effective, and you're left with the residual half, then the more boosted that is the better.