The study is a nationwide, multicenter, open label, randomized controlled trial. A target population of 220 children in treatment for cancer with neutropenic fever and a neutrophil count below 0.5 × 10⁹ cells/L with expected duration for more than 7 days will be recruited during the first 48 hours of antibiotic treatment (24 months inclusion period). They will be randomized 1:1 as follows: Experimental group: Discontinuation of antibiotics, despite neutrophil count below 0.5 × 10⁹ cells/L, after 48 hours of apyrexia and clinical stability Control group: Discontinuation of antibiotics when neutrophil count is equal to or above 0.5 × 10⁹ cells/L and the child is afebrile and clinically stable (up to maximum of 14 days after apyrexia and clinical stability). Primary endpoint is the number of days without antibiotic treatment in 28 days after treatment initiation. Secondary endpoints are crude mortality, severe adverse events, days with relapsing fever, and alterations of the microbiome.