Plant virus infections can go undetected, and indeed, surveys of produce find that the presence of live CaMV infections can be 15% in many different vegetables, and 20% in broccoli, for instance.

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It means some delay while they check and allow virus-free material to go through.

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Tech support personnel might have to go desk to desk to do fixes, or perform maintenance on e-mail servers that have become clogged with virus-generated messages.

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