Co-discoverer may pertain-to a virus.Logical formLearned from24 sentences. Combinations of antiviral drugs may hold a virus.Logical formLearned from24 sentences. A virus can be slow.Logical formLearned from24 sentences. A virus may infect files.Logical formLearned from24 sentences. A nation may be hited by a virus.Logical formLearned from24 sentences. Some persons may carry a virus.Logical formLearned from24 sentences. Viruses can be altered.Logical formLearned from24 sentences. Attachments may contain viruses.Logical formLearned from24 sentences. Protection can be against viruses.Logical formLearned from24 sentences. Viruses may undergo an adsorption.Logical formLearned from24 sentences. A virus may remain active.Logical formLearned from24 sentences. Humans may contract a virus.Logical formLearned from24 sentences. A virus can be in a region.Logical formLearned from24 sentences. Defense can be against viruses.Logical formLearned from24 sentences. A virus may undergo a reappearance.Logical formLearned from24 sentences.