An estimated 91,998,400 L of herbicides were stocked at three US airbases in Vietnam between 1962 and 1971. These herbicides were contaminated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-tetraCDD). In 2017, we sampled blood from 120 male Vietnamese military workers in the three dioxin-contaminated airbases (Bien Hoa, Da Nang, and Phu Cat) and from 20 workers at an uncontaminated airbase. 2,3,7,8-tetraCDD concentrations were highest in samples from Bien Hoa (18.2 pg/g lipid), followed by samples from Da Nang (9.2 pg/g lipid), Phu Cat (3.7 pg/g lipid), and the reference base (2.1 pg/g lipid). In Bien Hoa, 31 of the 50 subjects had blood 2,3,7,8-tetraCDD levels in the range of 10–100 pg/g lipid and four subjects had 2,3,7,8-tetraCDD levels that exceeded 100 pg/g lipid. In Da Nang, almost half of the subjects had blood 2,3,7,8-tetraCDD concentrations in the range of 10–100 pg/g lipid. These findings suggest that military workers at contaminated bases are the population most vulnerable to dioxin exposure, especially at Bien Hoa.

1962 年至 1971 年间，估计在越南的三个美国空军基地储存了 91,998,400 升除草剂。这些除草剂被 2,3,7,8-四氯二苯并对二恶英 (2,3,7,8-tetraCDD) 污染。2017 年，我们从三个受二恶英污染的空军基地（边和、岘港和富吉）的 120 名越南男性军人和一个未受污染的空军基地的 20 名工人身上采集了血液。来自 Bien Hoa 的样品中 2,3,7,8-tetraCDD 浓度最高（18.2 pg/g 脂质），其次是来自岘港的样品（9.2 pg/g 脂质）、Phu Cat（3.7 pg/g 脂质）和参考碱（2.1 pg/g 脂质）。在 Bien Hoa，50 名受试者中有 31 名血液 2,3,7,8-tetraCDD 水平在 10-100 pg/g 脂质范围内，4 名受试者的 2,3,7,8-tetraCDD 水平超过 100 pg /g 脂质。在岘港，几乎一半的受试者有血液 2,3,7, 8-tetraCDD 浓度范围为 10–100 pg/g 脂质。这些发现表明，受污染基地的军人是最容易接触二恶英的人群，尤其是在边和。