Researchers have isolated a set of antibodies from a llama which show promise for the treatment of COVID-19. The NIH-CoVnB-112 nanoantibody bound to ACE2 receptors up to ten times stronger than other lab-produced antibodies. The nanoantibody stuck directly to the ACE2 receptor binding portion of the SARS_CoV-2 spike protein. The protein could be effective in preventing coronavirus infection.