Animals including kind of fishes and frags breed quickly because these are primarily created so. These are not attack peoples. But other animals like that lion,tiger,and bear can attack peoples because their personality is aggressive. And than, if animals involving lion,tiger, and bear escape, they are dangerous because they harm people. Disease attack people, too. The flu is one of this, and the flu spreads easily because it is epidemic. One more thing which is epidemic is shiny pieces of jewelry. People usually are wearing a necklace and bracelet because they want to look like nice guy.