Can pneumonia cause white blood cells to rise 22000?

Yes, pneumonia can cause white blood cells to rise to 22000. Pneumonia is a lung infection that can be caused by bacteria, viruses, or fungi. When the lungs are infected, the body produces white blood cells to fight off the infection. This can cause the white blood cell count to rise significantly. A normal white blood cell count is between 4000 and 11000 cells per cubic millimeter of blood. A white blood cell count of 22000 is considered to be high and may indicate a severe infection.