From the study itself: "While the study's results suggested that immunity decreases 20 weeks after vaccination, a third booster (of the Pfizer-BioNTech vaccine, in the case of this study) helped the immune system to identify and neutralise the 20 different variants."
Twenty weeks. Five months. Rather akin to the cartoon, one observes. Additionally, the co-author is essential a veterinarian, as are a number of the leaders of the mRNA experimental drug makers.
Let's translate: "Third booster" means FIFTH shot, after two doses and two earlier boosters. So one may forecast that -- based on "immunity decreases 20 weeks after vaccination" -- a sixth will be called "crucial" in December.
Follow the science? Follow the money. As the article cites: "The University of Surrey's contribution to this study through the mapping of the various variants is itself part of a landmark €90 million collaborative effort to tackle zoonotic diseases in Europe, reflecting our focus on understanding the inextricable links between the health of animals, humans and, indeed, the planet we all share."
One notes also that the CCP-supported Imperial College London which spawned the economically devastating lockdowns throughout the West is a part of this "crucial" study too. Imperial College has been consistently wrong. Deduce what you will....