On Wednesday, GSK CEO Emma Walmsley confirmed that GSK has enough stock to meet its £600 million to £650 million guidance range. She said GSK expects Shingrix sales to keep growing "through next year and for it to be a very material contributor to growth for the company." What's more, because of all of the press the shot has generated, the company hasn't yet kicked off DTC advertising for the vaccine, global pharma president Luke Miels said on the conference call.