Since it is sprayed in the air, it only affects full adults; even then most reside in hard-to-reach places where spraying is unlikely to be effective.
再說，登革熱的主要病媒﹘﹘埃及斑蚊﹘﹘多半躲在室門隱密處如布幔摺縫、衣服等，這些地方都是噴藥不容易噴到的」，環保署環境衛生及毒物管理處技工黃基森表示。