[adventured]

We also know that cancer can be spread / caused by virus, from one person to another (eg HPV, and there are probably others waiting to be discovered).

And we know that you can intentionally force the formation of tumors / cancer through introduction. We do this in mice as a regular course of study now.

I suspect that over the coming decades, we're going to find cancer is a far more communicable disease than previously thought.

[Dylan16807]

> spread / caused by

That seems like a giant conflation to me.