The one I had isn't connecting anymore.

I don't know where to ask this, Google throws propaganda at the question.

For reasons of travel, I now have to be vaccinated to enter a certain country. So if one has to choose, which is safest?

EDIT - just to clarify, by safe I mean less likely to damage. Vaccine effectiveness isn't a variable here.

The one at 8kun is dead. I've been away for a while. Can anyone point me in the right direction?