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We have a follow-up of the Pfizer vaccine for two weeks now, and we have a follow-up of the Moderna vaccine just for one week at this time point. And what we see is that the Pfizer vaccine, after two weeks, you see an enhancement or increase in the number of antibodies and neutralizing antibodies -- a pretty nice increase. It's even a little bit higher than what we had after the third dose, yet, this is probably not enough for the Omicron.