No, the point is that it is very similar to previous, which HAVE been tested, with small tweaks. Your post was misleading in that to the unknowing, it's a new vaccine altogether, only tested on a handful (or two handfuls in this case) of mice.
Scientists off the back of that have decided it is without question, safe. Scientists who are a massively more informed and clever in the field of the vaccine than you, and without any shadow of a doubt, me. Without agenda.