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接种抗破伤风疫苗后的免疫持续时间多久现仍在争论中。除非以有关居民免疫持续时间的研究作为根据,就不可能介绍抗破伤风再接种的恰当时间。以巴西的萨奥波劳一间初级小学学生的预防接种资料进行调查研究。在那些已接受接种者,取血标本,用间接血球凝集法测定破伤风抗毒素水平。近两年接种或再接种抗破伤风的学生比那些超过两年以前接种或再接种者抗毒素水平高得多。这暗示在居民中二——三年要再接种抗破伤风一次,这种情况与以前研究过的结果类似。
How long the duration of immunization after vaccination against tetanus is still under debate. Unless based on studies on the duration of immunization of inhabitants, it is not possible to introduce the appropriate time for reintroduction of tetanus. A study was conducted on the vaccination information of a primary primary school student in Saopolau, Brazil. In those who have been vaccinated, take blood samples, determination of tetanus antitoxin by indirect hemagglutination. Students vaccinated or re-vaccinated against tetanus in the last two years had much higher levels of antitoxin than those vaccinated or re-vaccinated more than two years earlier. This suggests that vaccination against tetanus should be repeated in two to three years in the population, a situation similar to that previously studied.