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In this study astrovirus showed considerable persistence when dried onto porous and nonporous material. On china it survived for 60 days at 4ºC and 7 days at 20ºC. On paper at 4ºC, astrovirus infectivity was detected after 90 days, and for up to 60 days at 20ºC. Applied and Environmental Microbiology 2001;67:3904-3907.