There has not been much research on laboratory markers for children with COVID-19, however, one study found that 69.2% of the children presented normal leucocyte counts and that neutrophilia (4.6%) and neutropenia (6.0%) was rarely presented. Increases in C-reactive protein (13.6%) and procalcitonin (10.6%) were also identified with some children, along with lymphocytopenia in 3.5% of children. COVID-19 in children has a similar clinical spectrum to influenza.