Figure 4.

Global spread of pepino mosaic virus after its first detection in Peru, South America in 1974 (red arrow). After a 25 year delay, it reappeared in Western Europe, North America and East Asia. During the following decade, it spread rapidly within Europe and North America, arrived in some Middle Eastern and African countries, and was detected in two countries neighboring Peru. Subsequently, the only spread recorded was within China. The virus, which is seed-borne, was spread inadvertently by the international seed trade. An subsequent focus on trade in heathy tomato seed stocks reduced the risk of further global spread (figure credit @Washington State University/Naidu Rayapati). Figure from Supplementary data in [9].