White blood cells are part of our immune system that helps our bodies fight off disease.
Since everyone’s body is different, there is a range that is considered healthy for the average person. In adults the normal White Blood Cell (WBC) count is 3.5 to 10.5.
https://www.healthline.com/health/wbc-count#normal-range
As of March 26th, 2018, Mylene’s WBC was 3.6
If Mylene’s WBC fall below 3.5 her immune system would become highly vulnerable to any disease, even the common cold. She must be careful when and whom she interacts with.
Cold weather or a sick baby could send her to the emergency room.