In “Grandpa Was A Deity” and “Genesis of Genesis” we discussed the fact that the Scythians forbid pigs in their territory – a fact which later, via the Hyksos connection, became the basis for the Hebrew forbidding pork consumption.
Now, aside from the diseases contained in the meat, and saturated fat which clogs the arteries, we have a new reason for the prohibition -- porcine epidemic diarrhea virus (PEDV), which appears to be spread by airborne contaminated feces facilitating the rapid dissemination of the disease. Thus, we can assert the possibility that the Scythians recognized this reality, and therefore, as a protective measure, would exclude them from their territory.
Supposedly, PEDV was initially seen in Europe in the 1970s. We note that PEDV is not zoonotic, meaning it has not yet "jumped species" to infect humans or other animals. However, this does not mean a similar virus did not exist in the pre-Exodus Scythian era.
Never underestimate the extent of ancient knowledge – especially in the context of intervening cultures working hard to conceal, and the destroy, that knowledge.