I'd like to back up RockinSAHD
only full virus is infectious, fragments of DNA are absolutely meaningless. It's like saying "human flesh was found in the milk" when what you detected was half a skin cell! (actually, half a skin cell has the potential to be far more dangerous to health than a DNA fragment!)
Tests are so sensitive and when reported and interpreted in the wrong way can amount to misinformation.
And of course you wouldn't do it on purpose without research, but the only possible health outcome of having virus fragments in a VACCINE is that you would accidentally boost someone's immunity to that virus!