They didn't work. That's why they never got approved before and haven't since.

Wrong retardo, they’d been tested for years prior on humans which is why they worked
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No, they haven't. They have been attempting them for decades but they have never worked, despite all those years of research. The covid vaccine was the first to ever be approved and so far they are the only ones to have been approved.
https://en.wikipedia.org/wiki/MRNA_vaccine#History
The COVID-19 pandemic, and sequencing of the causative virus SARS-CoV-2 at the beginning of 2020, led to the rapid development of the first approved mRNA vaccines.

Wrong, they’ve been used for decades, retardo
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mRNA vaccines have been tested on people for decades
No they haven't. They had been trying to make them work for decades but never did until magically they "figured it out" just in time for covid. And for some reason we haven't had any more mRNA vaccines approved since, despite them supposedly being so amazing.

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Because they have never been successful you stupid bastard.
The only poster who had his account banned 4 times without ever breaking any rules each of those times.

Why would the last 4 years be needed if they were tested for decades prior?
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The last 4 years is what I am speaking on. You dumb sodomite. I used the past testing as an example you stupid ****.
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They were prior to that
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Not the last 4 years they werent.
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You just admitted they’ve been tested for past 30 years
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Last 4 years dumb dumb. In the past they were. Meaning before last 4 years.
How is it possible for you to be this stupid?
The only poster who had his account banned 4 times without ever breaking any rules each of those times.

Yes they were , you just admitted they were
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The covid vaccines of the last 4 years were not tested on humans. The drug Companies have already admitted this before Congress.
I think you are one of the sunbest people to wver walk the Earth. And stop projecting your attraction to children to me.
I think that's sick what you do. Get help
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They’re the same thing you retarded pederast
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Yes douchebag. But not the Covid vaccines of the last 4 years. You really have reading comprehension problems you ****in sodomite
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mRNA vaccines have been tested on people for decades, retardo
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The vax gave Fugazi a heart attack.
My password is password.

This is a simplistic argument from a Child.
Hundreds of .illions took the vaccine and it's boosters and sisnt die or get sick.
But guess what dick for brains. Millions also died from the Fuckin vaccine.
Also Millions more were blinded or crippled or had their healthy hearts severely damaged.
In the past if there even 30 or 40 fatalities the vaccine wouldn't have gotten approved.
But guess what these vaccines were NEVER tested on Human subjects. Look I have been stating this for 5 years.
So I just roll my eyes that now people are finally waking up.
I never took the Covid vaccine neither did my wonderful Mama.
But my Brothers and Sister and Nephew and Nieces and Cousins did .
The only poster who had his account banned 4 times without ever breaking any rules each of those times.

Yet trump got covid booster. Explain that away

Another link to prove how dumb you are
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https://www.filmboards.com/board/p/22833788/permalink/#p22833788

Yer understanding of science is deplorable
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