1) This refers to the AstraZeneca vaccine alone, not all of the vaccines.
2) If we wait until the "long term" is concluded, how long a period of time is that? One year? Five years? Ten years? Twenty years? Obviously if we wait that long, then nobody would ever get to take the vaccines.
3) Many drugs are on the market that have not had the luxury of five, ten, or twenty years of waiting. If the pharma companies had to wait for that "long term" to be concluded, no drugs would never be marketed at all.
4) Considering that the vaccines are being supplied to help stop a global pandemic like we have never experienced since the 1978 Influenza, what else can we do?
Sometimes you just have to weigh the risks of taking a vaccine versus the risks of not taking one. At my advanced age, the very real risks of not taking one outweigh the slightly possible long term risks.
Of course, we might all turn into brain-eating zombies, I suppose.
Having said that, I wouldn't take the AstraZeneca vaccine, either as a first or second dose.