Yeah, I've been noticing the MSM overuse of the word "breakthrough" as well. Undoubtedly it's some kind of brainwashing, mind controlling, jedi mind trickery buzzword for them.

But it's really just typical MSM deceitfulness at its core, because the vax manufacturers have never made the claim that the vax stops people from catching covid. So it's not even a "breakthrough," or even a surprise that people still get sick in spite of their overpriced snake-oil.