Natural immunity
Natural immunity is the body’s defense system against harmful substances and pathogenic microorganisms. Natural or innate immunity is provided by the genetic apparatus of the human body, which allows it to resist bacteria, viruses and other harmful objects.
**Primary immune barrier**
The body's first line of defense is the mucous membranes. The mucus and mucus secretions of various glands wash away dirt, microorganisms, dust, allergens and prevent them from entering further into the body. However, it is worth remembering that a lot depends on the cleanliness of the hand and other things, so washing your hands is not just necessary, but recently it is even necessary.
The second line of defense is the intestines. Various bacteria from the intestines, metabolic products of intestinal microflora affect the human immune system. Weak immunity is possible with intestinal dysbiosis. Most vitamins enter our body through the mouth, where they first reach the salivary glands, then