Because this is the biggest I told you so in history. We anti-vaxers were vilified for two years and still are by hardcore vaxers.
That is a typical psychological mindset.
It is always very difficult to admit when you are wrong.
Especially, on something that may shorten your life.
That a propaganda campaign convinced you to take an experimental vaccine that we will not know all the side effects for at least ten years.
That in the past vaccines were studied for years before widespread distribution.
People are in DENIAL. When they finally realize that they took a drug that is going to shorten their lifespan they hopefully will finally get pissed off.
... and still are by hardcore vaxers.
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They are calling for cancelling the CDC over loosening up on a couple of restrictions.
The vaxxers are determined that no one will escape.