The psychological "need" to be right plays into it as well. That particular friend I mentioned has the need to be right in spades, like many if not most others. Once "all in", it's hard to say "Whoops". It should be easy to say "Hey, I was 100% wrong", but that's not the case for a lot of us humanoids.
Another aspect is the fact they called the jabs "vaccines". That gives the idea that they work like traditional vaccines, or sub vaccines, neither being the case. It would increase public support so terming it as such...they knew what they were doing there anyway.
I think my friend would say that all vaccines have been thoroughly tested and proven to be effective....just because we are the USA where things are relatively safe and inspected - forget the bug parts per million allowed in flour-still gross! Even though she's a smart woman, she wouldn't think of checking the data because our trustworthy government is in charge. I am not wasting the energy to try to enlighten her, but today's conversation was really telling how people can be brainwashed.
Thanks for your sources and I'm reading them now.