Is there such a thing as a container that activates whenever you want it? and which cannot be pissed out or shat out?
Say like a tiny nanobot in the bloodstream which is remote controlled. If let's say it had a microphone would it able to listen to things outside the body?

Also would it be possible to install an audio or video camera on a dog without the owner realizing?

Is there such a thing as a bio egg, virus, natural poison that takes 6-36 months to incubate and kills you instantly like an alien?

Besides Hepathisis and tapeworms what other subtle viruses and parasites are out there which you can barely tell the effects of unless you got tested for them?