Delta plus variant raises concerns. Here's what the science shows : Goats and Soda : NPR

Delta plus variant raises concerns. Here's what the science shows : Goats and Soda : NPR: Question 2: So what about this new "delta plus" that's spreading in the U.K.? Scientists have named it "AY.4.2." And it now accounts for more than 6% of the cases there. Does that mean it's more transmissible than the current version of Delta dominating in the U.S.? "No one knows yet," says virologist Jeremy Luban at the University of Massachusetts Medical School. "It's too early to really know." That's because there isn't enough data yet to measure its transmissibility. "That said," Luban adds, "if it is more transmissible, it's likely to be a small increment." Hanage estimates that it's likely about 10% more transmissible than the original version of delta.

So here they're saying 10 percent more infectious, perhaps.  Nobody knows at this point.  Of course, I thought Delta was being hyped and it was not.