Africa and the Atlantic Slave Trade. Before the 16th century, Europeans were not deeply involved in slave trading on the West African coast. However, there was some movement of African labour to Madeira and the Canary Islands by the early Portuguese explorers from 1470 onwards.
urticaria is not contagious you cannot pass it on to another person acute urticaria or acute hives when symptoms last less than 6 weeks it is called acute urticaria this is by far the most common type 25 % of people with acute urticaria also have angioedema swelling in the deeper layers of skin
Again the question is pneumonia contagious depends on the exact germ which is the cause of infection. Many scientists are still unsure of when the period of contagion begins and finishes. Particular viruses become contagious up to three days before symptoms develop.Theoretically this means a person who has pneumonia can be contagious for approximately two weeks. But the contagion is worse when the person is suffering with serious symptoms.articular viruses become contagious up to three days before symptoms develop. Theoretically this means a person who has pneumonia can be contagious for approximately two weeks. But the contagion is worse when the person is suffering with serious symptoms.