A few days ago I read the following blog post from Petra Falb(https://www.ema.europa.eu/sites/default/files/ContactsAndExp...) about long term side-effects and why this is generally not a problem with vaccines: https://verdareno.wordpress.com/2021/01/01/covid-impfstoffe-...

I recommend https://www.deepl.com/translator for english translation, as I don't have the time right now unfortunately.

I don't have any background in this, so if anybody can chime in with more knowledge than me it would be appreciated.

But to me the point she is making sounds reasonable.