Preventing the spread of vector-borne and rodent-borne diseases is one of FEHD's most important tasks. The department reviews constantly the methodology and strategy used to control the spread of pests. Anti-rodent and anti-mosquito campaigns were mounted across Hong Kong during the year to urge people to help eradicate these pests.

A 12-month pilot study on keeping places free of rats was completed during the year. The study showed that, with active participation by residents, rat populations can be reduced.

The department continued its surveillance programme on Aedes albopictus, a major carrier of dengue fever in Hong Kong. Anti-mosquito squads conducted inspections of various places in 2006, including construction sites which they visited 20 612 times during the year. They also made 285 957 visits to village-type houses and eliminated 63 573 mosquito breeding grounds.