Ditchburn R K
Br Med J. 1979 Jun 16;1(6178):1601-3. doi: 10.1136/bmj.1.6178.1601.
An epidemic of whooping cough occurred in a rural practice in Shetland, containing 144 children under 16. Before July 1974 all children were immunised against pertussis, but after that date immunisation was stopped. Of the 134 children studied, 93 had been immunised. Sixty-five of the children developed whooping cough. The incidence of infection was similar in those who had and had not been immunised. The incidence was also similar in those born before and after July 1974. There was no evidence to support the routine use of pertussis immunisation in rural Shetland.
设得兰群岛一个乡村诊所发生了百日咳疫情，该诊所有144名16岁以下儿童。1974年7月之前，所有儿童都接种了百日咳疫苗，但自该日期之后，疫苗接种停止。在接受研究的134名儿童中，93名曾接种过疫苗。其中65名儿童患上了百日咳。接种过疫苗和未接种过疫苗的儿童感染率相似。1974年7月之前和之后出生的儿童感染率也相似。没有证据支持在设得兰群岛乡村地区常规使用百日咳疫苗接种。
