Neutropenia means a low neutrophil count. The normal range for neutrophils is 2.5-7.5 x 109/L. Moderate neutropenia is defined as a neutrophil count of 0.5-1.0 x 109/L. Severe neutropenia is a count of <0.5 x 109/L.
This is a companion discussion topic for the original article at https://patient.info/doctor/neutropenic-patients-and-neutropenic-regimes