Transport of animals, plants, and germs into Americas, Europe, and Africa. Millions of people died from bubonic plague, typhoid, typhus, influenza, measles, chicken pox, whooping cough, malaria, and diphtheria.Introduction of animals like pigs, cattle, horses, goats, and sheep revolutionized the agriculture. Horses were used for travel and warfare. Sheep provided hides and wool. Plants to the New World are peaches, oranges, grapes, melons, bananas, rice, onions, radishes, and various green vegetables. Sugarcane demand the use of slaves. To Europe, maize, potatoes, sweet potatoes, peppers, beans, manioc, peanuts, squash, pumpkin, pineapple, cocoa, and tomatoes. Potatoes became a major peasant food.