OpinionJune 9, 2021
Why We Don’t Know the Animal Origins of the Coronavirus
Viruses that “spill over” to people do not stick around in animals, so finding true sources takes years of careful work, an expert says
Stories by Christine K. Johnson
Christine K. Johnson is a professor of epidemiology and ecosystem health and director of the EpiCenter for Disease Dynamics at the One Health Institute at the University of California, Davis’s School of Veterinary Medicine.