In the much less-invasive test, the patient uses a saline solution to “ swirl, gargle and spit," the Guardian reported.... “ Unlike the nasopharyngeal swab, this is a new saline gargle where you put a little bit of normal saline water in your mouth, you swish it around a little bit – and you spit it into a little tube.... And that’s an easier way to collect it for young people, ” Dr....