Newborns, after strenuous exercise, etc. Sometimes it can lead to temporary physiological leukocytosis. When the number of white blood cells is less than 4000 /m3, it is called leukopenia, which is more common in viral infections, such as influenza, viral hepatitis, malaria, aplastic anemia, drug poisoning, lead poisoning and X-ray injury.
Extended data:
White blood cells are born in bone marrow and enter the blood stream when they grow up. They are larger than red blood cells and have a diameter of 10- 15 microns. Because they are all white, they are called white blood cells. Under normal circumstances, there are about 4000- 10000 white blood cells per cubic millimeter of blood. Less than 4000 or more than 10000 is a sign of illness.
The number of white blood cells in blood is not as much as that of red blood cells, and their life span is short, with an average life span of only 9- 13 days. However, they have great ability to kill enemies, can resist the invasion of foreign bodies such as germs, devour bacteria that enter the body, and improve human immunity. They are loyal guardians of human health.
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