But these pets carry plenty of germs and allergens , prompting researchers to ask : are cats and dogs really safe for children 但是这些宠物身上携带大量的细菌和过敏原，促使研究员们提出这样一个问题：猫狗等小动物真的不会引起孩子的过敏吗？
And those who used to use or are currently using botulinum toxin or are allergic to certain allergens or botulinum toxin were not included 而先前曾经使用或目前正在使用肉毒杆菌毒素者或对某些过敏原或肉毒杆菌毒素过敏者亦不在纳入范围之列。
" dogs are dirty animals , and this suggests that babies who have greater exposure to dirt and allergens have a stronger immune system , " gern says 狗是肮脏的动物，这就意味着婴儿越多的暴露在肮脏和过敏源充分的环境下，他们的免疫系统就会更强壮。
We have been able to take a protein that is currently an allergen and modify specific amino acids in the protein to dramatically reduce the allergenic nature of the protein 我们已经可以针对某些会引起过敏反应的蛋白质，修改其中特定的胺基酸，大大降低了其致敏性。
However , products that contain spices , flavors or nutrition supplements derived from these major food allergen groups will be required to provide the appropriate disclosures 但是，包含有调味料、香料或源自这些主要食品过敏源的营养添加剂的产品将要求提供适当的披露。
If it does , it identifies that allergen as an object to be attacked , thus priming the body for an allergic reaction the next time the allergen in question is encountered 免疫系统致敏之后，就会把过敏原识别为进攻的目标物，再次预见目标过敏原就会动员机体产生超敏反应。
