“A likely scenario is that there will be a need for a third dose, somewhere between six and twelve months, and then an annual re-vaccination, but all of this has yet to be confirmed,” said the CEO of the US pharmaceutical company. Broadcaster CNBC in a published interview that was conducted in early April. The variants of Sars-CoV-2 also played a major role.
Other scientists and pharmaceutical representatives had already made similar statements. Pfizer and its German partner Biontech, as well as other manufacturers, are currently investigating the effect of possible boosters of their corona vaccines.