What happens inside the lungs before COVID-19 symptoms appear? Research in mink offers a rare window into the early stages of the disease. These insights matter for both animal and human health. Researchers and veterinary pathologists from Wageningen Bioveterinary Research (WBVR, part of Wageningen University & Research), together with Royal GD and Utrecht University, followed the course of SARS-CoV-2 infection in mink.