Istre G R, Hopkins R S
Am J Public Health. 1985 Mar;75(3):280-1. doi: 10.2105/ajph.75.3.280.
Seven of eleven persons who attended a picnic developed symptoms of hepatitis A, two and a half to five weeks later. The epidemiologically implicated source was tuna salad, served in sandwiches and prepared by the index case. The number of sandwiches consumed was inversely related to the incubation period. This phenonemon may explain some of the variability of incubation periods for hepatitis A.
参加野餐的11人中，有7人在野餐2.5至5周后出现甲型肝炎症状。经流行病学调查，源头指向由首例病例制作、夹在三明治中供应的金枪鱼沙拉。食用三明治的数量与潜伏期呈负相关。这一现象或许可以解释甲型肝炎潜伏期的部分变异性。
