Fig. 5
From: Porcine epidemic diarrhea virus: An emerging and re-emerging epizootic swine virus
Potential international PEDV transmission routes. Genetic subgroups of PEDV were marked with different colors as described in the legend to Fig. 4. Solid lines indicate PEDV spreads that have already occurred between countries; dotted lines indicate PEDV spreads that are expected to happen eventually; dashed circular arrows denote genetic mutations or recombination events that lead to the emergence of the novel subtypes