Newborn infants gain most of their immunity from
A) early immunizations.
B) contact with viruses and bacteria.
C) antibodies passed from the mother across the placenta.
D) contact with siblings.
E) innate factors.

Question

Quizplus · Accepted Answer

Newborn infants gain most of their immunity from antibodies passed from the mother across the placenta, which provide protection for the first few months of life until the baby's own immune system is fully functional. Early immunizations are typically not given until a few months after birth, and contact with viruses and bacteria can be dangerous for a newborn. Contact with siblings and innate factors can also contribute to immunity, but the primary source is the transfer of antibodies from the mother.

Newborn Infants Gain Most of Their Immunity from