It's not just food (even if contrary to what you think, the digestive system does not filter everything, especially not pesticides, microplastics, etc.), there are also the clothes and cosmetics we wear, the materials of which can pass through the skin, the air we breathe, possibly polluted with fine particles, household products, asbestos (if in an old building)... All this will do a lot more harm in the long term than a small vaccine