Researchers have isolated a set of promising, tiny antibodies, or ‘nanobodies,’ against SARS-CoV-2 that were produced by a llama named Cormac. Preliminary results suggest that at least one of these nanobodies, called NIH-CoVnb-112, could prevent infections and detect virus particles by grabbing hold of SARS-CoV-2 spike proteins. In addition, the nanobody appeared to work equally well in either liquid or aerosol form, suggesting it could remain effective after inhalation.