Countries may be hited by a virus.Logical formLearned from21 sentences. A hit can be by a virus.Logical formLearned from21 sentences. A virus may undergo a confirmation.Logical formLearned from21 sentences. A virus may spread across a country.Logical formLearned from21 sentences. A test can be for a virus.Logical formLearned from21 sentences. Viruses may spread.Logical formLearned from21 sentences. A male may be exposed to a virus.Logical formLearned from21 sentences. Viruses may be isolated.Logical formLearned from21 sentences. Forms can be constituted-of-or-filled-with viruses.Logical formLearned from21 sentences. A virus may cause damage.Logical formLearned from21 sentences. A component may pertain-to a virus.Logical formLearned from21 sentences. A virus may be introduced.Logical formLearned from21 sentences. A male may get a virus.Logical formLearned from21 sentences. Virus may undergo a shedding.Logical formLearned from21 sentences. A virus can be integrated.Logical formLearned from21 sentences.