Thousands of people in the Caribbean are becoming sick with a virus called chikungunya, which causes debilitating fever and severe joint pain, according to news reports. The chikungunya virus was once confined to Africa and Asia, but was brought into the Americas likely by an infected traveler in December. Since then, more than 51,000 suspected and nearly 5,000 confirmed cases of infection have occurred throughout the Caribbean islands, according to The Pan American Health Organization. More