Angulo J J, Walter S D
J Hyg (Lond). 1979 Feb;82(1):1-6. doi: 10.1017/s0022172400025407.
Household aggregation of cases, one possible characteristic of person-to-person transmitted disease, was formally tested in one epidemic of variola minor by using a pair statistic. A significant result was found for all households as well as for households grouped by the type of environment, or by the phase of the epidemic growth in time. Secondary attack rates, when related to household size (number of susceptibles) showed only a marginal trend in rural households but no trend in urban or semi-rural households.
病例的家庭聚集性是人际传播疾病的一个可能特征,在一次轻症天花流行中,通过使用配对统计量对其进行了正式检验。结果发现,所有家庭以及按环境类型或疫情随时间增长的阶段分组的家庭都有显著结果。当与家庭规模(易感者数量)相关时,农村家庭的二代发病率仅显示出微弱趋势,而城市或半农村家庭则没有趋势。