[amluto]

All that is great but out of date. For the bivalent booster, we have:

https://www.cdc.gov/vaccines/acip/recs/grade/covid-19-bivale...

Which seems to be entirely lacking in efficacy data. MMWR just has immunogenicity and speculation, too:

https://www.cdc.gov/mmwr/volumes/71/wr/mm7145a2.htm