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.
City of Thunder Bay, Canada . Thunder Bay, formerly the twin cities of Fort William and Port Arthur, is a city in Ontario, Canada. Thunder Bay's name is the result of a referendum held on June 23, 1969 to determine the new name of the combined Fort William and Port Arthur. Thunder Bay's main tourist attraction is Fort William Historical Park, a reconstruction of the North West Company's Fort William fur trade post as it was in 1815, which attracts 100,000 visitors annually.