This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
Patients undergoing splenectomy require following vaccinations except 
Select and explain. 
A. Pneumococcus, B. Gonococcus, C. Haemophilus, D. Influenza
D: Influenza
Answer: D: Influenza 
Explanation: Postsplenectomy septicaemia may result from Streptococcus pneumoniae, Neisseria meningitides, Haemophilus influenzae and Escherichia coli. (Oppounist post-splenectomy infection (OPSI))If elective splenectomy is planned, consideration should be given to vaccinating against pneumococcus, meningococcus C (both repeated every 5 years) and H. influenzae type B (Hib) (repeated every 10 years).Ref: Bailey and love 27e pg: 1187