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| Bangkok females 4 years and older are at 
	increased risk to DSS. Previous studies had established that dengue virus 
	infection rates were equal in male and females in the open population of 
	Bangkok children (Halstead SB et al AJTMH 18:997-1021, 1969). Bangkok females 4 years and older are at increased risk to DSS. Previous studies had established that dengue virus infection rates were equal in male and females in the open population of Bangkok children (Halstead SB et al AJTMH 18:997-1021, 1969).  |