Many viruses/trojans/malware also get spread by email attachments and those affected can be unaware they are acting as hosts infecting others. They don't need to have visited dubious sites themselves.
Cheers, Richard
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09 America, Staintune Pipes, K&N, Breathe, Hagon Nitros, AI & O2 removed, tune 20184 (modified), MTX-L a/f gauge
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