A virus can be modified.Logical formLearned from152 sentences. A virus can be dreaded.Logical formLearned from151 sentences. A virus can be related.Logical formLearned from150 sentences. Testing can be for a virus.Logical formLearned from150 sentences. Viruses can be harmful.Logical formLearned from149 sentences. A victim may pertain-to a virus.Logical formLearned from149 sentences. A virus can be destructive.Logical formLearned from148 sentences. Immunity can be to a virus.Logical formLearned from148 sentences. A variant may pertain-to a virus.Logical formLearned from147 sentences. Some persons may die from a virus.Logical formLearned from147 sentences. Viruses can be infectious.Logical formLearned from146 sentences. A surface may pertain-to a virus.Logical formLearned from144 sentences. Levels can be constituted-of-or-filled-with virus.Logical formLearned from142 sentences. A virus may remain hard.Logical formLearned from139 sentences. A virus can be active.Logical formLearned from139 sentences.