The fear-mongering about breakthrough cases is so overblown and exaggerated it might as well be a total hoax. This is a pandemic of the unvaccinated.

From Vox:

Even when a vaccinated person is exposed to the coronavirus, the chances of hospitalization and death are near zero. In fact, experts said, the vast majority of breakthrough cases are likely to produce no symptoms whatsoever.

And...

The total reported breakthrough case rate among vaccinated people was 0.034 percent. The hospitalization rate among reported breakthrough cases was 0.0032 percent. The breakthrough death rate was 0.0009 percent.

Read the whole thing here.