The VAXXERS Having just finished VAXXERS, the book by Professor Sarah Gilbert and Dr Catherine Green on how they designed, made and validated the Oxford Astra-Zeneca vaccine, it is clear that much needs to be done to produce vaccines quicker. Having just finished VAXXERS, the book by Professor Sarah Gilbert and Dr Catherine Green on how they designed, made and validated the Oxford Astra-Zeneca vaccine, it is clear that much needs to be done to produce vaccines quicker. It is not the scientists who take the time. “We designed the vaccine in a few days in January and made the first batch in 65 days,” writes Professor Gregory.