What documents do I need to travel outside the United States? In general, you will need to present a passport from your country of citizenship or your refugee travel document to travel to a foreign country. In addition, the foreign country may have additional entry/exit requirements (such as a visa).
However, avian influenza A viruses are very contagious among birds and some of these viruses can sicken and even kill certain domesticated bird species including chickens, ducks, and turkeys. Infected birds can shed avian influenza A viruses in their saliva, nasal secretions, and feces.
Avian flu is caused by a virus, H5N1, that can be contracted through handling infected birds. Since 1997, more than 120 million birds worldwide have died from the flu or after being destroyed to prevent the disease's spread. H5N1 is highly lethal in humans.istorians widely believe that rats were the cause of the Black Death, and these furry urban scourges are also known to carry other harmful microorganisms. Among them are rat-bite fever, a disease that can be caused by two different bacteria.