  This letter investigates the epidemic spreading in two-vectors propagation
network (TPN). We propose detailed theoretical analysis that allows us to
accurately calculate the epidemic threshold and outbreak size. It is found that
the epidemics can spread across the TPN even if two sub-single-vector
propagation networks (SPNs) of TPN are well below their respective epidemic
thresholds. Strong positive degree-degree correlation of nodes in TPN could
lead to a much lower epidemic threshold and a relatively smaller outbreak size.
However, the average similarity between the neighbors from different SPNs of
nodes has no effect on the epidemic threshold and outbreak size.
