internet - Virus messages beat spam

A new development in the daily increasing stream of useless messages in my mailboxes: I get more virus-related email today than spam. In total hundreds of them, although some of my ISP's told me they have installed anti-virus software to stop it. China Telecom still is good for most of the nuisance. You wonder why so much effort is being put in stopping useful messages and not in stopping this nonsense.