Asia: Malayan pitvipers are responsible for thousands of cases of snakebite in South and South-East Asia.
The Americas: Rattlesnakes are found from southern Canada throughout the USA into Mexico, Central and the northern half of South America.
Africa, Middle East and Asia: The cobras (genus: Naja) are one of the most widely distributed groups of venomous snakes in the world spanning most of Africa, parts of the Middle
The king cobra (Ophiophagus hannah) is the world's largest deadly snake and measures up to 18 feet long (5.4 m), as per the Natural History Muse