Guess it’s 42% for Pfizer according to this preprint.[1] That’s July, so presumably even lower now. I thought I saw 47% somewhere more official but can’t find it now.
“ However, in July, the effectiveness against infection was considerably lower for mRNA-1273 (76%, 95% CI: 58-87%) with an even more pronounced reduction in effectiveness for BNT162b2 (42%, 95% CI: 13-62%).”
[1]https://www.medrxiv.org/content/10.1101/2021.08.06.21261707v...
“ However, in July, the effectiveness against infection was considerably lower for mRNA-1273 (76%, 95% CI: 58-87%) with an even more pronounced reduction in effectiveness for BNT162b2 (42%, 95% CI: 13-62%).”