E-Mail As the fight against COVID-19 continues, scientists have turned to an unlikely source for a potentially effective treatment: tiny antibodies naturally generated by llamas. While the world has welcomed the news of multiple vaccines against COVID-19, the search for effective treatments for those who contract the virus is ongoing. Now scientists are looking to what might seem to be an unlikely source: the South American llama. Researchers are using the ultrabright X-rays of the Advanced Photon Source (APS), a U.S. Department of Energy (DOE) Office of Science User Facility at DOE's Argonne National Laboratory, to help turn naturally generated llama antibodies into potentially effective therapies against SARS-CoV-2, the virus that causes COVID-19. Antibodies are the immune system's natural defense against infection, and when extracted from blood, they can be used to design treatments and vaccines.