A top Thai health official has just issued a warning that dengue fever incidence in the country may be particularly high this year. So far in 2008 6,000 individuals have been infected and 6 have died; last year less than 5,000 individuals had been infected by mid March. The peak of dengue infections--during the rainy season from June to August--has not even struck yet. Just last year 91 people were killed and 63,000 were infected by the dengue virus. Fumigation efforts to kill the primary vector, Aedes aegypti, are underway.