Answer:
The doctor may count ones white blood cells to see if there is an infection or injury present.
Explanation:
White blood cells are a type of cells that promote health and healing. So, if there is a higher amount than usual this could indicate a possible infection or sickness.
Preferably about 30 minutes a day
Phenergan(promethazine) is generally used for allergies, motion sickness, and headaches. So theoretically you could. You'd have to check the dosages though.