South Korea has been largely bedbug-free for years, but it has seen a surge in infestations as travel has rebounded after the pandemic -- with more than 100 cases of the bloodsucking pests reported.

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When news broke about a bedbug outbreak in his native South Korea, 29-year-old blockchain engineer, and self-professed insectophobe Kang Jae-gu got straight to work -- on