@freemo someone who knows more about this than me #gastroenterologist, #immunologist, #microbiologist could tell you whether a 'sterile' human could survive or even exist. How was the bubble boy fed? Did he receive intravenous nutrition?
Healthy humans carry 1.5 kg of a diverse selection of bacteria in their intestines (the microbiota), which have an important role in maintaining health. A healthy diet maintains a healthy gut microbiome, and we are only just beginning to understand the importance of these bacteria.
It is not only the gut that carries a commensal bacterial load, any body cavity linked to the external environment will carry a non-pathogenic community of bacteria, including the uterus. This means, we are likely to be exposed to placental bacteria in the womb. Once exposed in the womb I don't know how a human would be subsequently 'sterilised' of bacteria.
I stand to be corrected by those with the knowledge!
@Renshaw01 I always assumed he was fed regular food that was steralized.. steralizing food at least is easy, we do it with can food all the time
But yea, your points are my own, would love some answers...