This is hard to respond to, because I don't know what you think I think. I don't think viruses have some sort of “neural or neural analog” or coordinate in some way, so I suspect you don't understand what I'm saying.
I just think, on average, an individual virus particle will mutate at a certain rate. If there are a million times the population, a virus as a whole will then mutate 1 million times faster. So, if a certain virus would given a certain mutation, would jump to another species, and that had a certain chance to do so, then that same virus with 1 million times its normal population would have 1 million times the chance to do so.
That's about as spelled out and basic I'm able to make it.
I just think, on average, an individual virus particle will mutate at a certain rate. If there are a million times the population, a virus as a whole will then mutate 1 million times faster. So, if a certain virus would given a certain mutation, would jump to another species, and that had a certain chance to do so, then that same virus with 1 million times its normal population would have 1 million times the chance to do so.
That's about as spelled out and basic I'm able to make it.