A virus may undergo infections.Logical formLearned from65 sentences. Fears may pertain-to a virus.Logical formLearned from65 sentences. Viruses may pertain-to a male.Logical formLearned from64 sentences. A person may carry a virus.Logical formLearned from64 sentences. A virus may undergo an isolation.Logical formLearned from64 sentences. A virus may undergo an understanding.Logical formLearned from64 sentences. Deaths may be reported from a virus.Logical formLearned from64 sentences. Virus can be in a country.Logical formLearned from63 sentences. An immunity can be to a virus.Logical formLearned from63 sentences. A virus may pertain-to persons.Logical formLearned from63 sentences. A subtype may pertain-to a virus.Logical formLearned from63 sentences. A case may pertain-to a (bird flu virus).Logical formLearned from63 sentences. A vaccine can be against a virus.Logical formLearned from62 sentences. An effect may pertain-to a virus.Logical formLearned from62 sentences. Protection can be from (virus threats).Logical formLearned from62 sentences.