The Special Capital District of Jakarta occupied the 1st level of dengue fever [outbreak classification] for the length of 2007.
More than 30 percent of the cases of dengue fever came from Jakarta, the Head of Health Service Special Capital District, Dr. Wibowo Sukijat, MPH, said on Thursday (Dec 6, 2007). This number is an increase compared to the previous year  when there were 24,932 cases with 39 deaths.
There were several factors in Jakarta that account for why this area had the highest numbers of dengue fever cases, including bad environment, the mobility of many inhabitants, the inhabitants's substantial population, as well as increased temperatures, so virus [transmission] has been increasingly raging.
The [dengue virus mosquito vector] control campaign has not yet given optimal results.