In general, every human being is born with immune system, and that’s why we are able to survive the health challenges of childhood and grow into healthy adults. That said, experts also note that there are individuals that are born without immune system and such individuals must undergo certain medical procedures, including bone marrow transplant, if only to be able to live normal lives that a good immune system confers.
http://9jahealth.com.ng/dont-toy-with-your-immune-system/