translation.en: Engineers, by moving around a small number of genetic changes, were able to weaponize it and make it much more easy for human beings to catch, so that not thousands of people would die, but tens of millions.
translation.zh: 工程师们通过来回移动少量的 基因变化， 能够将它武器化 并使它更容易传染给人类 如此一来，死去的人将何止成千上万， 恐怕将以数千万计。