As of 2010, it had safely delivered genes into the bodies of more than 600 people (though some of the genes have produced unintended side effects). (scientificamerican.com)
Tests on monkeys show the hybrid virus delivers genes to the lungs far more efficiently than any other method developed so far. (newscientist.com)
It had a good ability to deliver genes without potential to do harm, or even cause a cold. (discovermagazine.com)