The neutralization antibody levels for measles vaccine virus and wild measles virus in sera of measles patients in acute phase and convalescent phase were determined by trace neutralization test.

用微量中和试验测定麻疹病人急性期和恢复期血清中和麻疹疫苗株和野毒株的中和抗体水平。

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SSPE due to wild virus has been reported in persons who have been immunized with measles vaccine and have no history of symptomatic natural measles infection.

在接受麻疹免疫接种者和无天然麻疹感染史者中，野病毒引起的SSPE病例一直有报告。

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Conclusions Wild-type measles virus prevailing in Zhejiang Province has appeared significant antigenic variation.

结论浙江省麻疹野毒株已出现明显的抗原性变异。

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In May 2010 in a study involving 275 children vaccinated with the MMR vaccine, who demonstrated regressive autism and bowel disease, the Wake Forest University School of Medicine reported that of the 82 so far tested 70 proved positive for measles virus all of which was the vaccine measles strain none were wild measles strains.

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