That is not strictly speaking true. There have been no long term studies for the most recent mRNA vaccines, but mRNA technology has been in development for many years with much of the effort going into studies of human safety. This long period of development and testing is how the method of packaging the mRNA in a precisely engineered blob of fat came about.

>mRNA technology has been in development for many years with much of the effort going into studies of human safety.

Have there been any long term human trials of mRNA vaccines?

Yes, though that might depend on your definitions of both long term and vaccine. There is actually a quite interesting body of literature surrounding these developments, so it might be worth doing some searches and some reading.

Do you have any sources for long term mRNA vaccine trials on humans?

My searches seem to indicate there are none, other than the preliminary, limited scope short term trials

So what? What's the mechanism you're concerned about?

>What's the mechanism you're concerned about?

What do you mean?

We can't know what the long term side effects of drugs are until we have long term data.

Even with long term data showing significant negative side effects of drugs, we often dont understand the "mechanism"

If the drug breaks down rapidly in the body, yes, we can indeed know that. Then there can be no mechanism by which it can have long term effects. That's what happens with the delivered mRNA.

I'm fully for vaccination as I wrote above.

But out of interest, what about the people who have long-haul COVID, do we know the mechanism how they experience long term effects from the actual disease.

Would it be possible that vaccines created long-term effects in the same way?

What is the "mechanism" from the vaccine which has caused some people to get thrombocytopenia, bells palsy, temporary deafness, and other such side effects in just the short term?

Hyperactive immune response gone wrong?

Scientists don't know what causes auto immune reactions/disorders, or why they have seemingly been on the rise for decades.

> What do you mean?

Apologies, don't mean to pick on you but wanted an example for a future comment.

This maintains context worse than GPT-3

"I've been smoking cigarattes for the past year and nothing bad has happened to me, i guess they are perfectly healthy"

What about long-term studies for the actual COVID?