Thursday 21 November 2019

How babies develop immunity


When can I take my baby out?

I often see the teeny-tiny newborn’s in shopping malls and I have to resist the urge to make a fuss over them, firstly because I know Mom is protective as a she-bear, and secondly, my person is abuzz with bacteria, viruses and even fungi that could be potentially harmful to a new-born still colonizing microorganisms. In other words, developing their immune system.

I’m often asked when it’s safe to take the baby out for the first time and I like to caution new mothers to avoid people-busy places like malls, church services and even birthday parties for the first four weeks – especially if her baby was born by c-section, was premature and is not breast-fed.

Here’s why.

Newborns have an under-developed immune system. This is because, for the first nine months of life, they were protected by their mother’s immune system, the placenta and her cervix (the doorway to her womb). A baby’s first introduction to microbes and bacteria is through the vagina – and providing the mother is clean and healthy, these ‘harmless’ bacteria help to jump-start the baby’s immune system.

Babies born by c-section don’t have this advantage.

Immediately after birth, a healthy baby is put skin-to-skin between the mother’s breasts. Here the baby is comforted by her smell, the sound of her voice and heart-beat and her body warmth. Over and above this, healthy microbes on mom’s skin are transferred to her baby through suckling, introducing these organisms to her baby’s gut where healthy bacteria are essential for digesting and absorbing nutrients. 

Premature babies are more at risk because they miss out on the last few weeks (even months) of developmental maturity, they’re mostly born by c-section and often put onto antibiotics. This is when kangaroo-mother-care is a big plus and expressed breast-milk (EBM) is a must.

Luckily, babies are incredibly adaptable and within a few short weeks, they’re colonizing microorganisms by the billion. By the time babies are crawling and exposed to dirt on the floor, the dog’s food, and garden snails, their gut microbiota is able to cope with and eliminate most germs.

According to neonatologist Nicholas Embleton, at Newcastle University, UK, “by the age of two or three, the composition of a child’s gut microbiota is very similar to that of an adult’s,” which means, they have a healthy immune system, making it pretty difficult for disease-causing microbes to make them sick.  

Photo from "UNSPLASH"