According to the Centers for Disease Control and Prevention's updated guidelines, students diagnosed with head lice do not need to be sent home early, instead they should get appropriate treatment and return to school the next day.Earlier, parents were advised not to send their children to school until the lice eggs, also known as nits, were no longer visible on the scalp.Head lice are parasitic insects, commonly found on the head, causing symptoms like itching, sleeplessness, irritability, and sores on the scalp due to scratching.'Nits may stay in hair after treatment, but successful treatment will kill crawling lice,' the CDC stated on its website..

根据疾病控制和预防中心最新的指导方针，被诊断患有头虱的学生不需要提前被送回家，相反，他们应该得到适当的治疗，第二天返回学校。早些时候，建议家长不要送孩子上学，直到头皮上不再可见虱子卵（也称为虱子）。头虱是一种寄生性昆虫，常见于头部，会引起瘙痒、失眠、烦躁不安和头皮因抓挠而酸痛等症状CDC在其网站上表示，治疗后，虱子可能会留在头发中，但成功的治疗会杀死爬行的虱子。。

The agency also advised schools to discontinue requiring children to be free of lice eggs before returning to class.The updated guidelines reflect the CDC's belief that, 'Unnecessary days off cause a burden to the students, families, and communities, and far outweighs the risks associated with head lice.' 'Head lice do not transmit any disease and therefore are not considered a health hazard,' the agency noted.

该机构还建议学校停止要求儿童在返回课堂前不要携带虱子卵。最新的指南反映了疾病预防控制中心的信念，即“不必要的休息日会给学生、家庭和社区带来负担，远远超过头虱的相关风险。”该机构指出，头虱不会传播任何疾病，因此不被视为健康危害。

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