To the Editor: In their Notable Case on jellyfish envenomation causing Irukandji syndrome,1 Fenner and Hadok suggest that similar deaths may have occurred in the past, with the relationship to Irukandji syndrome not being recognised. However, their call for urgent research into developing an antivenom needs to be based on a clear understanding about the risk of death. Unfortunately, they have not presented data that clearly establish causation or support their conclusions about treatment and the need for further research.
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