Five more people have come down with the mosquito-borne chikungunya fever in Singapore, Xinhua quoted the Health Ministry (MOH) as saying today. They include two foreign workers at Kranji Way, bringing the total number of cases linked to the northern industrial area to 30, said the ministry. The two, a 48-year-old Indian and a 34-year-old Chinese National, have no recent history of travel overseas prior to their onset of illness, said the authorities. The Ministry said it has also been notified of three other cases not related to the Kranji cluster. So far this year, there has been 103 cases of chikungunya fever in Singapore. Like dengue fever, chikungunya fever is a mosquito-borne disease, characterized by sudden onset of fever, chills, headache, nausea, vomiting, joint pain with or without swelling, and low back pain. The best way to prevent chikungunya fever is to take precautionary measures to prevent mosquito breeding.