I do not know scientifically...
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No one does. They can claim this and that, but the EU and US VAERS reporting system has well over 8K deaths, hundreds of thousands serious reactions.....no one knows anything about it. No one can possibly know until 5-10 years down the road ...... EXPERIMENTAL says all.
and not just experimental but never been done before in humans
They have tried to develop these before and the animal test results were very bad, in laymans terms.