Africa is highly vulnerable to emerging infectious diseases due to its tropical climate, environmental changes from global warming, rapid population growth, and poor infrastructure. Many new diseases have originated in Africa in recent decades, including malaria, cholera, Ebola, and yellow fever. The destruction of rainforests is partly to blame, as it disrupts natural buffers against diseases and creates new breeding grounds for mosquitoes. Global warming is also contributing by allowing malaria and other diseases to spread into new areas. Infectious diseases account for 63% of deaths in Africa.