What does it mean if a 6 y/o child has elevated white blood cell count and his inflammation marker is high?

Viral vs bacterial. Not too infrequently, children present with fever without clear source. We have utilized white cell count and inflammation markers, e.g., sed rate or CRP to distinguish viral vs bacterial infection. Elevated white blood cell and high inflammation marker suggest the likelihood of bacterial infection.
Stress response. This is a classical stress response.The origin of that stress is not clear from the test. It takes the history/physical & other pieces of the puzzle to come up with a reasoned explanation for the testing.