A virus may undergo a replication.Logical formLearned from200 sentences. Protection can be from viruses.Logical formLearned from198 sentences. Virus may undergo a transmission.Logical formLearned from195 sentences. A group can be constituted-of-or-filled-with viruses.Logical formLearned from194 sentences. An outbreak may pertain-to a (bird flu virus).Logical formLearned from193 sentences. A person may have a virus.Logical formLearned from190 sentences. A cure can be for a virus.Logical formLearned from188 sentences. A fight can be against a virus.Logical formLearned from188 sentences. An ability may pertain-to a virus.Logical formLearned from182 sentences. A virus may undergo a mutation.Logical formLearned from181 sentences. A nature may pertain-to a virus.Logical formLearned from180 sentences. A risk may pertain-to a virus.Logical formLearned from178 sentences. An origin may pertain-to a virus.Logical formLearned from177 sentences. Viruses may undergo a transmission.Logical formLearned from175 sentences. A virus may be found.Logical formLearned from174 sentences.