Clements C J
N Z Med J. 1982 Jun 23;95(710):422-3.
A Schick survey of 689 children was carried out in the Wellington health district during winter 1981. Only 25 (3.6 percent) were found to be non-immune. Although this appears to indicate a high level of herd immunity in school children, the results must be interpreted with caution. Because cases of diphtheria are still occurring in New Zealand, it is argued that unless efforts are made to raise the level of infant immunisation, this country cannot be considered free from the threat of an increase in clinical diphtheria, particularly among non-Europeans.
1981年冬季，在惠灵顿健康区对689名儿童进行了锡克试验调查。结果发现，只有25名儿童（3.6%）没有免疫力。虽然这似乎表明在校儿童的群体免疫力水平较高，但对结果的解读仍需谨慎。由于新西兰仍有白喉病例发生，有人认为，除非努力提高婴儿免疫接种水平，否则该国不能被视为不存在临床白喉病例增加的威胁，尤其是在非欧洲裔人群中。
