According to the National Geographic, scientists are attempting to develop contagious vaccines that would spread from the vaccinated to the unvaccinated. Scientists believe that creating a contagious vaccine could help prevent pandemics started by zoonotic diseases–infectious diseases that are naturally transmissible from animals to humans. However, Jonas Sandbrink, a biosecurity researcher at the University of Oxford’s Future of Humanity Institute, said, “Once you set something engineered and self-transmissible out into nature, you don’t know what happens to it and where it will go.”
