Pfizer’s vaccine chief on Omicron, mix-and-match boosters, and being prepared for the unknown

Pfizer and partner BioNTech announced Wednesday that new data show that antibodies generated by their Covid vaccine appear less effective against the Omicron variant than other variants, but that a third booster dose likely provides sufficient antibody protection. Those data are very preliminary. But STAT took the opportunity to catch up with Pfizer’s head of vaccine research, Kathrin Jansen, who has been one of the main architects of the development program that has helped make the Pfizer-BioNTech vaccine the most widely used of the Covid shots. Jansen emphasized that Pfizer is developing an Omicron-specific vaccine, but that she does not know exactly what strategy the world should or will take over the coming months. Instead, she is focused on being prepared for anything.