bio~~~~~white blood cell

1. infection - viral and bacterial infection (wound infection, urinary tract infection, respiration infection, meningitis, fever, hepatitis)
2. inflammatory response
3. leukemia (acute myelocytic leukemia, chronic myelocytic leukemia,chronic lymphocytic leukemia)
4. multiple myeloma (sharp increase in antibodies, but decrease in WBC)
5. patient on colony stimulating factor (factor/drug which induces the production of certain types of WBC)
6. severe allergy (sharp increase of eosinophils - a type of WBC)

inflammation
presence of pathogens your body
different kinds of diseases
have a wound
leukemia
infection

Wound infection,
fever,
meningitis,
imflammation,
urinary tract infection,
upper respiratory tract infection