A (bird flu virus) may begin.Logical formLearned from19 sentences. (Virus samples) may undergo a sharing.Logical formLearned from19 sentences. A treatment can be for virus.Logical formLearned from19 sentences. A virus may gain a foothold.Logical formLearned from19 sentences. A female may have a (stomach virus).Logical formLearned from19 sentences. A virus can be inactive.Logical formLearned from19 sentences. Blood may contain a virus.Logical formLearned from19 sentences. A virus may cause infection.Logical formLearned from19 sentences. A virus may be spreaded through bodily fluids.Logical formLearned from19 sentences. A virus can be at birth.Logical formLearned from19 sentences. A virus may be transmitted between humans.Logical formLearned from19 sentences. A virus may become an epidemic.Logical formLearned from19 sentences. A vessel can be for some viruses.Logical formLearned from19 sentences. (Influenza viruses) can be seasonal.Logical formLearned from19 sentences. A virus may spread among humans.Logical formLearned from19 sentences.