28 July 2021, 09:07 pm Single-Domain Antibodies, also known as "Nanobodies," have been discovered from Alpacas, and are now used against the SARS-CoV-2 virus. The notorious SARS-CoV-2 is also known as the virus which causes COVID-19, and the said nanobody treatment helps in preventing it from infecting the body's cells, as well as its "mutations." Blocking COVID-19 from cells is better protection than having no shield from it. Nanobodies from camels have initially been reported to be protecting against COVID-19 and prevent it from spreading and causing a chain reaction within the body. Single-Domain Antibodies Protects Against SARS-CoV-2 (Photo : By NIAID) Experts have reason to believe those who tested positive to COVID-19 again are non-infectious.