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Table 1 Regions (prefectures) and numbers of pregnant women tested

From: Effects of campaign for postpartum vaccination on seronegative rate against rubella among Japanese women

Regions (prefectures) Direction from Tokyo No. of women
A (Hokkaido) 830 km N 1450
B (Toyama) 260 km NW 803
C (Tochigi) 100 km N 2467
D (Tokyo 1) 15 km W* 7329
E (Tokyo 2) 40 km W* 3642
F (Kanagawa) 35 km W* 4672
  1. N, north; NW, northwest; W, west; *, from Japan Railroad Tokyo Station.