Children and we have been surrounded by microorganisms. Bacteria, viruses, chlamydia, mycoplasma and fungi are almost everywhere, but we can live healthily in such an environment. Ever wonder what we rely on to take care of ourselves? It turns out that the human body has a subtle and powerful immune system, which can identify foreign substances, repel and eliminate harmful foreign substances, and protect our bodies from infringement and harm. Some of this magical ability is innate, and some are acquired by children when they grow up. Innate Immunity-Mechanical Defense Barrier During the 10 months I lived in my mother's womb, I developed my own immune system. Now, I was born! Dad, mom, come and see what I am born with to resist diseases! Effect of cilia on respiratory mucosa of cough nasal secretions and normal peristalsis of saliva and urine intestines In addition to these mechanical defense barriers mentioned above, chemical and biochemical substances in human body are also helping immune function. Dr. Ding Ding reminded that the baby's health begins with the expectant mother, and the baby is not a blank sheet of paper. He came into this world with innate immunity. Congenital immunity includes mechanical defense barrier and antibacterial and bactericidal effects of biochemical components in the body. At the same time, it also includes feeding routes and nutrients. These three items are the inevitable way for a baby to gain immunity. Innate immunity-feeding routes and nutrients Before I was born, all the nutrients I needed came from my mother's placenta. These nutrients can not only help me grow up, but also give me innate immunity! After I am born, I will eat with my mouth. At this time, breast milk is the best nutrition. But there are also some mothers who cannot breastfeed their babies for various reasons. Then you'd better choose infant formula for us. Tip: Another benefit of breastfeeding Modern research shows that breast milk is not sterile. Because the female mammary duct is also an open organ, it naturally contains normal flora such as Staphylococcus epidermidis and Streptococcus salivarius. This discovery shows that breastfeeding is a process of bacterial feeding, that is, during breastfeeding, the child's intestine will accept the mother's normal flora. This is conducive to the improvement of baby's immunity. Look down and you will know! Acquired immunity-getting sick from infectious diseases is also a way to build an immune system. Nothing worries my mother more than being sick. Indeed, the disease will do some harm to the baby's body, but it will also promote the maturity of our acquired immune system. Therefore, mothers should have a complete understanding of their children's illness and treat the disease correctly under the guidance of doctors. Vaccination Vaccination is an artificial process of "creating diseases". Although, in the struggle against diseases again and again, our body will also produce "memory", thus improving immunity. But how painful it is to be sick! Is there a better way to deal with the disease? Therefore, scientists have developed some vaccines. By vaccination, our body has another layer of defense ability. Unfortunately, the types of vaccines are too limited now. Acquired Immunity —— Where are the normal bacteria in human body? Before I was born, my mother's uterine environment was sterile, but after I was born, various microorganisms in the natural environment-bacteria, viruses and so on. -will gradually "register" in my body. But don't misunderstand them. Because they are the "normal flora" of the human body, they will accompany us all our lives. Eyes, conjunctiva, oral cavity, nasopharyngeal cavity, external auditory canal, skin, upper respiratory tract, digestive tract and urethra have been eating mother's milk, so the normal flora in the intestine is mainly Bifidobacterium, accounting for 99%. No wonder I don't get sick and allergic easily. Although some of my friends can't drink their breast milk, there are also some infant formulas containing probiotics, which are beneficial to the establishment of infant immunity. In addition, some pharmaceutical preparations also contain probiotics.