What does it mean when your white blood cells are high?

 A high white blood cell count isn't a specific disease, but it can indicate another problems, such as infection, stress, inflammation, trauma, allergy,

A high white blood cell count is an increase in disease-fighting cells in your blood. However, this is not beneficial. A high white blood cell count can indicate another problem, such as infection, stress, inflammation, trauma, allergy, or certain diseases. Hope this answers the question.

No, when getting the flu vaccine no drugs should be being takin at the time.