Hi, I do not understand the number "2" in this context.
When I was on chemo, the number they paid the most attention to related to neutrophils. When mine was 435/mm3, they delayed the chemo for a week. The normal range is 1500 - 7500, anything below 1000 being considered dangerously low in the absence of other factors such as chemo dosage being too high, etc.
Sometimes, whilst the count is low, I would be invited to return the following day and have the blood test in the hospital. I was amazed that the neutrophil count could go up by thousands overnight!!!
I still have all my blood test results so if you want to come back with a bit more information, maybe I can help you with some explanations. In any event, I wish your sister good luck.