The message in the early period of control campaigns in the 1970s was “mosquitoes are more dangerous than a tiger, cause dengue hemorrhagic fever”. Health mes- sages aimed to educate people to prevent themselves from mosquito bites. Control activities consisted mainly of spraying adulticides supplied by the central health authority. To maintain this activity at the national level required substantial effort and resources. The amount of adulticides used decreased after 1984, replaced by alternative control methods such as the elimination of breeding sites and larviciding (Gratz, 1993; Wangroongsarb,1998). In 1988, the control campaigns began to focus on community-based interventions concerned with “larval control” within households. Dengue larval control health education messages in Thailand tend to emphasize a causal chain model beginning with larvae leading to a rise in the adult mosquito population and culminating in a rise in DHF (Fig. 1).