Usually when viruses infect cells, the host immune system can fight to eventually clear the virus.

通常当病毒感染细胞的时候，宿主的免疫系统能够抵御并最终消灭病毒。

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Make sure your security software provides anti-virus, anti-phishing, safe browsing, a Host-based Intrusion Preventions System (HIPS), and firewall capabilities.

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The virus, first detected nearly two weeks ago by the military's Host-Based Security System, has not prevented pilots at Creech Air Force Base in Nevada from flying their missions overseas.

CNN: Computer virus hits U.S. drone fleet