As for the Sputnik vaccine (and the Sinovac one in China), sampling rare events such as these and reporting them is a function of how many people have been given the vaccine + the amount of transparency of the authorities in the countries administering these vaccines.
Why would it? A prion is a specific protein, why would this specific mRNA molecule, which only exists in our body for hours, cause that specific protein expression, when we have hundreds of thousands of other mRNA molecules per cell all similarly experiencing their own self destruction?
I don't understand why you're so confused about the lack of knowledge from someone who declared their lack of knowledge.
https://www.snopes.com/fact-check/pfizer-neurological-damage...
Science is about curiosity, not faith. Shaming people for asking questions discourages the former and expects the latter.
The user that asked the question didn't further engage, they just threw in some doubt and walked away. That doesn't feel like scientific curiosity. That feels like pot stirring.
I am genuinely confused as to why there seems to be more side effects/issues with the 'traditional' J&J vaccine vs. the mRNA Moderna/Pfizer vaccines. I would have thought the opposite to have been true.
But then again the Sputnik vaccine seems to be doing ok? So maybe it's just the J&J formulation. Who knows though, the peer reviewed data for this hasn't had much time to go through rigorous scrutiny.