evidence: A viral Facebook post makes the false claim that the nasal swab test for COVID-19 damages the "blood-brain barrier" and can therefore lead to brain infections. Medical experts say the swab test is completely safe. [...] But in recent weeks, viral posts on Facebook falsely claim that the nasal swab test can cause serious health issues. One post says, "The stick deep into the nose causes damage to the hamato-encephalic barrier and damages endocrine glands. This test creates an entrance to the brain for every infection." [...] Fauzia, Miriam. "Fact check: No, the COVID-19 nasal test doesn’t swab the blood-brain barrier." USA Today. 9 July 2020.