The biggest outbreak so far, the latest cluster at Kranji Way brings the number of people infected in the area to 20.

Previously, the largest chikungunya outbreak here was also Singapore's first outbreak, when 13 people living or working in Little India came down with the dengue-like disease in January this year.

Separately, a technician who lives in Miltonia Close off Yishun Avenue 1 and works at Marsiling Industrial Estate fell ill to chikungunya on July 18. He was hospitalised for five days.