Dengue haemorrhagic fever or “Kai Leard Ork” in Thai means “bleeding fever”. All participants knew DHF as a childhood disease caused by a bit of Yoong Lai (striped mosquito) or A. aegypti. Most participants had learnt about DHF from schools as a part of a
health education subject and from the media such as TV, radio and newspaper reporting the fatality of DHF cases. All participants believed young children were the highest-risk group for DHF. Most participants recognised high fever, muscle pain and petechiae as a common sign of DHF. Nonetheless if DHF was epidemic in their community, high fever represented the most likely trigger for people to consider the presence of DHF. Besides high fever, the serious sign of DHF, bleeding, e.g., epistaxis would prompt the parents to seek the treatment for their sick children. The health education material also emphasises how to protect children from DHF.