We find that enhancing users' sense of security can only reduce the impact of im worm, but can not slow down its propagation.

单独增强用户的安全意识只能减少病毒的感染范围，不能减缓病毒的传播速度。

youdao

Although there have been malicious bots around for some time instant messaging, security firm IMLogic believes that this is the first time someone has tried to use bot code to help spread a worm around an IM network by pretending to be a legitimate user.

BBC: Hand on keyboard