Interesting considering that the CDC had revised their estimate and lowered their estimate of omnicron cases to less than half,
And WHEN do you think that happened ?
Hint: it occurred on 12/18/21 - which was more than a month ago (appears it was first reported around 12/28/21)
meaning delta is currently more prevalent and their antibodies work against that strain.
... WAS more prevalent ... more than a month ago:
CDC - COVID Data Tracker - Monitoring Variant Proportions