No, that's really not enough said! mRNA on its own doesn't guarantee long term side effects. The mRNA is completely broken down by the body. It gets destroyed. Our bodies do that all the time as part of being alive! 

The vaccine that was temporarily paused due to extremely rare events among vaccinated people that *might* be side effects  — Astra Zeneca— wasn't an mRNA vaccine at all! It's a viral vector vaccine. 

1) those are two different things and 
2) proving the blood clotting issue us a direct result if the viral vector vaccine is about proving that claim is true, if it was the makeup of the vaccine, or if it was the body's immune response to something that resembles Covid. (Meaning if they caught covid outright it would have been worse.)