We have spoken with leading scientists associated with both of the major theories for how the virus got to Wuhan—either due to animal-to-human spillover or via the research process. Both theories remain plausible. As we said at the beginning of the chapter, more evidence about the origins of COVID-19 might emerge from investigations into sources outside of China. At present, we just do not think there is enough evidence available, yet, to come down hard either way.
