A COVID-19 treatment inspired by llamas

When llamas encounter pathogens like viruses and bacteria, their immune systems fight them off with two weapons: antibodies much like those made by the human body and much smaller antibodies called single-domain antibodies or “nanobodies.” Now, those nanobodies have inspired a potential treatment for COVID-19 that may be able to be delivered straight to the lungs, where the virus tends to set up shop.