The differince I imagine is how it has 'fresh' hosts, and can spread quickly, possibly overwhelming care, or complicating other medical issues. The flu seems th

The differince I imagine is how it has 'fresh' hosts, and can spread quickly, possibly overwhelming care, or complicating other medical issues. The flu seems throttled by varied, but somewhat common, resistance in humans, where this has little or none. Otherwise, no, it seems to me, a layman, as being about as intense as the flu from a purely individual, symptomatic perspective.