South African variant off the top of my heard from memory.
All the vaccines apert from AZ have shown a slight drop in effect against transmission bit still work well enough to hinder transmission.
AZ did have the bad data for transmission from African trial. However the general thought is that the trial was done with a 3/4 week gap. As we know AZ needs longer to get its full antibody effect that is thought to have been the problem. The country doing the trial needed a vaccine with quicker effect as using on health staff so dropped it.
The other thing with that trial is it was a lab dish test. Not real world data. So between a longer gap and the normal body immune system (T cells extra). AZ shouldn't be much different than the others against the south African variant transmission. Also the hospitalisation and death reduction is expected to be very good still. I don't think they have given us new evidence for this yet but could be wrong.