A virus may undergo a transfer.Logical formLearned from37 sentences. Viruses can be discovered.Logical formLearned from37 sentences. Viruses may be knowned.Logical formLearned from37 sentences. A virus may cause cold sores.Logical formLearned from37 sentences. A virus may cause genital warts.Logical formLearned from37 sentences. Virus may be detected.Logical formLearned from37 sentences. Fragments may pertain-to a virus.Logical formLearned from37 sentences. A strain may pertain-to an (influenza virus).Logical formLearned from37 sentences. A virus may reappear.Logical formLearned from37 sentences. Protection can be from a virus.Logical formLearned from37 sentences. A virus can be severe.Logical formLearned from37 sentences. A (bird flu virus) can be virulent.Logical formLearned from37 sentences. Migratory birds may carry a virus.Logical formLearned from37 sentences. Some persons can be with a virus.Logical formLearned from37 sentences. Entry may pertain-to a virus.Logical formLearned from37 sentences.