I’m surprised I haven’t seen any of the “experts” discuss this topic.
There are a number of viruses that have antibody-dependent enhancement (ADE) properties.
Most notably:
SARS-CoV (sound familiar?) MERS-CoV Dengue virus
A vaccine is literally the worst thing you could do to treat these viruses. It makes subsequent infections exponentially worse.
That’s why we are seeing so many fully vaccinated people testing positive for and/or dying from the “delta variant.”
Yep!