Baruzzi R G, Abdala N, Black F L
Trop Geogr Med. 1982 Mar;34(1):7-12.
Vaccine induced measles antibody titers in the Upper Xingu Indians remained at satisfactory levels without evidence of decline over a period of six years without re-exposure. However, in another area, a vaccination program which used a reduced dose of vaccine was only 63% effective. When measles virus was introduced to the latter area a protracted epidemic ensued with 23% of the population becoming ill and six deaths. The deaths occurred exclusively under 13 months or over 40 years of age.
在欣古河上游印第安人中，疫苗诱导产生的麻疹抗体滴度在六年未再次接触麻疹病毒的情况下一直保持在令人满意的水平，且无下降迹象。然而，在另一个地区，使用较低剂量疫苗的免疫计划仅63%有效。当麻疹病毒传入该地区后，引发了一场持久的疫情，23%的人口患病，并有6人死亡。死亡病例均为13个月以下或40岁以上的人群。
