自身免疫性疾病包括1型糖尿病、类风湿性关节炎、炎性肠病和多发性硬化症。
In each case, the immune system gets its wires crossed and turns on healthy tissue instead of infectious agents.
上述每种疾病都会使免疫系统出现错乱，攻击自身健康组织而非病原体。
In the UK alone, at least 4 million people have developed such conditions, with some individuals suffering more than one.
仅在英国，就有至少400万人患上这类疾病，有些人出现不止一种病症。
Internationally, it is now estimated that cases of autoimmune diseases are rising by 3% to 9% a year.
据估计，目前全球自身免疫性疾病病例每年增长为3%至9%。
Most scientists believe environmental factors play a key role in this rise.
大多数科学家认为环境因素在其中发挥重要影响。
Fast-food diets lack certain important ingredients, such as fiber, and evidence suggests this alteration affects a person’s microbiome – the collection of micro-organisms that we have in our gut and which play a key role in controlling various bodily functions.
快餐饮食缺乏某些重要营养成分，如膳食纤维，有证据表明这种饮食改变会影响人体内的微生物群(肠道微生物群)，它们对调节身体各方面功能起着关键作用。
These changes in our microbiomes are then triggering autoimmune diseases, of which more than 100 types have now been discovered.
微生物群的这些变化便会引发自身免疫性疾病，目前已经发现了100多种该类型疾病。
