Yes, but it's not hidden. On the one side of it: humanity, and our ability to explore, comprehend, and modify the reality around us. On the other side of it:

Yes, but it's not hidden. On the one side of it: humanity, and our ability to explore, comprehend, and modify the reality around us. On the other side of it: naturally-evolved viruses. They have a couple billion years' practice overriding biological countermeasures and massive territory advantage. If we do nothing, odds are they will eventually mutate into something that drops us dead in our tracks or wrecks us slowly, as they have before (smallpox, 1918 flu, HIV). And in our modern, deeply-interconnected world, geographic defenses and population isolation no longer protect us as they did our ancestors. The main tools we have to avoid this are our ability to explore, comprehend, and modify. The capacity to change something and observe how the change affects it is something the viruses cannot do, and arguably our best chance of "outsmarting" them so that when they naturally mutate into a dangerous form, we already have the tools in place to mitigate or disassemble the danger.