> At a guess, unless there is a hard mechanical reason (such as the particle size a filter will pass) all communicable diseases can be transmitted through all v

> At a guess, unless there is a hard mechanical reason (such as the particle size a filter will pass) all communicable diseases can be transmitted through all vectors but with extremely low incidence, so low as to be safe to ignore unless there is documented evidence that a disease can be transmitted. I'd be interested in an epidemiologist's or other expert's analysis of this question. My experience is that non-experts in any field greatly exaggerate the possible in 'anything is possible'. But I know that in my field bugs and errors are predictable; a user might say 'X happened' but I know that X simply never occurs (something is wrong and the problem needs to be solved, but it's not X). (I'm trying to come up with an example for X, but it's kind of hard to think about the impossible.)