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Tubular structures outside the virus-containing vesicles. (a) Tubular structures (open arrow) arrayed with large space but in the same direction; nucleocapsid inclusions (arrow), empty vesicle (arrowhead) and virus-containing vesicles dispersed among them. Bar, 100 nm. (b) Tubular structures arranged orderly around the virus-containing vesicles in cytopathic cells. Bar, 100 nm.
