Survivor since 2012
A normal white blood cell count is around 10,000. I assume your mom's is 47,000. With a high white cell count and a fever it sounds like your mom has an infection going on. (I was a nurse in a former life.) She needs to reach out to her doctors ASAP.
If she can't reach them, and depending on how bad she feels, you might want to consider going to the ER at a hospital with which her doctor is affiliated. Be sure she wears a mask (you can get one at a drug store). She probably needs to have blood work and other tests to figure out what's going on.
Keep us posted, and please continue to ask any questions you might have.