So often you see people who are for vaccines (which I am for, massively) and for GMOs (which I'm only conditionally for) arguing SCIENCE SCIENCE SCIENCE without actually making an argument. Science can't prove any vaccines or GMO are safe in general, any more than pharmaceuticals or processed foods in general could be proven safe. The FDA and CDC carefully monitor vaccines. Processed foods and GMOs less so or not at all. Merely invoking SCIENCE doesn't let anybody off the hook.