Samples from the infant’s mother’s bloodstream suggest the 5-year-old’s mother had a significantly elevated concentration of measles-related antibodies than one would expect from a child her age,” said lead author Janet Leigh, adding that the child’s mother also appeared to be immune to the debilitating diseases of typhoid and whooping cough than one would expect from a child her age. “This child’s mother has been extremely passive, which may indicate that her immune system has not been properly protecting her from dangerous diseases.

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This child has not been getting the vaccinations she should have gotten at least six months ago, when she was still in the early stages of pregnancy.” The researchers also confirmed that the child’s father, who has not received any vaccines whatsoever, has not been tested for any diseases besides measles.