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biology a simple living thing that is smaller than bacteria and that can enter your body and make you ill. If your body can protect itself against a particular virus, then you are immune to it. A vaccine is a medicine that makes you immune to a particular virus 病毒;滤过性病毒 Synonyms and related words
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a disease caused by a virus 病毒病;病毒感染 I've been in bed all week with a virus. 我因病毒感染而整周卧床。
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