A strain may pertain-to a (bird flu virus).Logical formLearned from437 sentences. A (flu vaccine) can be seasonal.Logical formLearned from425 sentences. A person may get a flu.Logical formLearned from425 sentences. A bout can be constituted-of-or-filled-with flu.Logical formLearned from420 sentences. An outbreak can be constituted-of-or-filled-with flu.Logical formLearned from399 sentences. A male may have a flu.Logical formLearned from374 sentences. A strain can be constituted-of-or-filled-with flu.Logical formLearned from334 sentences. A flu may pertain-to a person.Logical formLearned from330 sentences. An outbreak can be constituted-of-or-filled-with avian flu.Logical formLearned from313 sentences. Flu can be in a country.Logical formLearned from301 sentences. A (bird flu) can be suspected.Logical formLearned from286 sentences. A flu can be deadly.Logical formLearned from284 sentences. A fight can be against (bird flu).Logical formLearned from279 sentences. Cases may pertain-to a flu.Logical formLearned from274 sentences. A flu may pertain-to a world-city.Logical formLearned from268 sentences.