Omicron substantially reduced antibody levels generated by Pfizer vaccine

The link is broken. There is a missing "o". https://www.businessinsider.com/omicron-resist-pfizer-vaccin...

IIUC it's not that the variant reduce the number of antibodies that you have. It is just that most of your antibodies are not effective against omicron.

> A team of researchers led by Africa Health Research Institute's Alex Sigal tested 14 blood samples from 12 people against a live sample of the Omicron variant. All 12 people were vaccinated, and six were previously infected.

> another group of researchers ... found a seven-fold reduction across 17 blood samples.

12 and 17 look like very small numbers, and the results are too different.

Title adapted from first paragraph as more descriptive than the original "The First Study Assessing Pfizer's Effectiveness Against Omicron Just Came Out".