Edited by Brian P. Pace, MA, Assistant Editor.
One of the last lessons that a physician has to learn is that a child
is not a little man. At birth the child is a very incomplete human; it increases
in size rapidly during the first few months of extra-uterine life, but this
rapid growth of its organs is of course at the expense of the stability, in
other words, the resisting power of the organism to abnormalities of all kinds.
The blood of infants and young children is especially prone to undergo changes
from slight causes and, as a rule, the younger the individual the less the
effort needed to throw the blood off its balance, so to speak. For instance,
lesions causing a slight leucocytosis or an anemia in an adult would be very
likely to bring about a marked leucocytosis or an anemia of high grade in
THE BLOOD IN INFANCY.. JAMA. 1998;279(22):1778L. doi:10.1001/jama.279.22.1778