Viruses cause a number of diseases in eukaryotes. In humans, smallpox, the common cold, chickenpox, influenza, shingles, herpes, polio, rabies, Ebola, hanta fever, and AIDS are examples of viral diseases.Even some types of cancer -- though definitely not all -- have been linked to viruses.n humans, smallpox, the common cold, chickenpox, influenza, shingles, herpes, polio, rabies, Ebola, hanta fever, and AIDS are examples of viral diseases. Even some types of cancer -- though definitely not all -- have been linked to viruses.
Map of the fortifications. Located in Canada, the Ramparts of Quebec City are the only remaining fortified city walls in North America north of Mexico. The British began refortifying the existing walls, after they took Quebec City from the French in the Battle of the Plains of Abraham in 1759.
The Berlin Wall was a border security installation built by the German Democratic Republic (GDR) on August 12, 1961. Officially called the Antifaschistischer Schutzwall (anti-fascist protection dike), the wall was to protect the GDR from aggressive acts by the West.hus, these three sectors, which comprised West Berlin, became an island surrounded by East German (GDR) territory. The Wall dissected eight train lines, four underground train lines and 193 major and minor roads. In total, the wall measured 97 miles.