The basis for the last sentence below: New data from David Ho's lab showing that while adults & kids have ~equal antibody responses to XFG & NB.1.8.1, children have essentially no neutralizing antibodies to BA.3.2.
This seems to solve the BA.3.2 + kids mystery. 1/14
www.biorxiv.org/content/10.6...
Ryan Hisner
My best guess is dead-end virus evolution combined with a continually broadening global population antibody response that makes it more difficult for novel variants to completely escape—except in those with few exposures (such as children).
