A higher level of antigenic variation and associated infectiousness renders the C-19 vaccines less efficient in containing the infection. This currently leads to breakthrough infections in the vast majority of vaccinees whereas breakthrough disease cases are now on the rise too. On the other hand, enhanced infectiousness poses a serious threat to unvaccinated individuals as it may erode their innate, variant-nonspecific immunity upon re-exposure after primary asymptomatic infection (14).
What do you think that means, keeping in mind 14 is not a reference as one might expect, but just a bit more explanation of high infection settings. It sounds like an explanation about how escape mutations from vaccinated people might affect the unvaccinated. But I would say it s purely innuendo, and explains nothing, and has no references. In particular there's no explanation of why a vaccine-induced escape mutation is any different from any other mutation particularly one from a reinfected, unvaccinated person.