Chikungunya is an illness caused by a virus that spreads through mosquito bites. The most common symptoms of chikungunya are fever and joint pain. Other symptoms may include headache, muscle pain, joint swelling, or rash. Chikungunya disease rarely results in death, but the symptoms can be severe and disabling. Most people who get sick feel better within a week. In some people, the joint pain may last for months or years.
The six new deaths were all reported in the French Caribbean island of Martinique, where the number of deaths from the disease now stands at 19.