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As mosquitoes arrive early, Chinese health authorities urge vigilance against dengue fever, chikungunya_蜘蛛资讯网

osquito-borne diseases — dengue fever and Chikungunya — to Class B notifiable infectious diseases starting on Wednesday, warning of heightened risks as the insects appear earlier than usual this year.

ikungunya — to Class B notifiable infectious diseases starting on Wednesday, warning of heightened risks as the insects appear earlier than usual this year.The announcement, issued by China's National

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