Cdc released updated vaccine effectiveness data yesterday re: hospitalization for the single variant mRNA vax+booster:
https://www.cdc.gov/mmwr/volumes/71/wr/mm7142a3.htm
“Three-dose monovalent mRNA VE estimates against COVID-19–associated hospitalization decreased with time since vaccination. Three-dose VE during the BA.1/BA.2 and BA.4/BA.5 periods was 79% and 60%, respectively, during the initial 120 days after the third dose and decreased to 41% and 29%, respectively, after 120 days from vaccination.”
For those on the board in the know, is the initial effectiveness due to antibody response/prevalence and the loss of effectiveness because the t and B cells weren’t doing their thing?
I guess we’ll be finding out in several months if this bivalent version performs similarly….