A virus can be deadly.Logical formLearned from7 093 sentences. A spread may pertain-to a virus.Logical formLearned from4 629 sentences. A strain may pertain-to a virus.Logical formLearned from2 511 sentences. A virus may undergo a transmission.Logical formLearned from1 883 sentences. A virus may mutate into a form.Logical formLearned from1 435 sentences. An outbreak may pertain-to a virus.Logical formLearned from1 386 sentences. A virus may spread.Logical formLearned from1 352 sentences. A (bird flu virus) can be deadly.Logical formLearned from848 sentences. Cases may pertain-to a virus.Logical formLearned from672 sentences. A form may pertain-to a virus.Logical formLearned from649 sentences. A virus can be contagious.Logical formLearned from646 sentences. A virus may pertain-to a female.Logical formLearned from621 sentences. Persons may be infected with a virus.Logical formLearned from614 sentences. A virus can be lethal.Logical formLearned from612 sentences. Presence may pertain-to a virus.Logical formLearned from597 sentences.