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一名北卡罗来纳州医生问:一名旅游者最近决定放弃非洲之行,因为他得不到必需的脑膜炎球菌性脑膜炎预防接种。他所在的旅游团往往在启程前1~2周才提供价格优惠的出国旅游机会。已知疫苗接种后产生免疫力需要一定时间。那么,就必要的免疫按种而言,那些一接到通知可能便要启程的旅游者应在何时接种为宜?
A North Carolina State Doctor asked: A tourist recently decided to abandon his trip to Africa because he did not receive the necessary immunization against meningococcal meningitis. His tour group often offers preferential price travel abroad 1 ~ 2 weeks before departure. It is known that it takes time to produce immunity after vaccination. So, when it comes to the kind of immunization necessary, what should travelers who are likely to leave when they are notified?