Scientists hope the special antibodies that llamas make can be directed against SARS-CoV-2 to help find our way out of the pandemic. Rockefeller University says that humans, too, make antibodies against SARS-CoV-2, and many groups are working on developing treatments based on them. Llama antibodies, however, come in a simpler design than their human counterparts. “For reasons that we don’t really understand, these animals make this variant of antibody that just has fantastic properties,” says Michael P. Rout, a structural biologist at Rockefeller. “It contains the good disease-recognizing parts of a human antibody, packed into a condensed warhead.”