<prompt> The most common complication of immunosuppression is:MalignancyGraft rejectionInfectionThrombocytopenia  <response>: Ans. c InfectionRef: Bailey 26th edition, Page 1416 Bacterial infection is most common in 1st month and is most common in those who are critically ill before and after transplant. Viral infection is most common in 6 months--Most common is CMV HSV BK virus is universal in childhood causes urinary infection Pneumocystis Jiroveci Previously known as Pneumocystis carnii is one important fungal infection. 