MSFinals-4117

MSFinals-4117

A 4-year-old boy, with a history of acute lymphoblastic leukaemia (ALL), is admitted to the Paediatric Ward due to a fever of 38.9 °C at home. He received his last treatment 1 week ago. His parents report that he has been feeling well, without cough, cold, rash, or vomiting.
Upon examination, his vital signs are stable except for a temperature of 38.4 °C. Physical examination is unremarkable. Blood tests and blood culture are taken from the portacath, revealing a haemoglobin (Hb) level of 11.5, a white cell count (WCC) of 1.1, neutrophils of 0.2, and a C-reactive protein (CRP) level of 85.
What is the most crucial next step in managing this patient?