Fact Check: Does the Nasal Swab for COVID-19 Test Reach the Blood-Brain Barrier?

The nasopharyngeal swab that is widely being used to detect Covid-19 may cause discomfort that reaches far back into the nose. But the claim saying it damages and scrapes the blood-brain barriers is completely anatomically impossible. The process of swabbing does not reach and hurt the blood-brain barrier, where the brain and blood vessels exchange essential nutrients.