Active concurrent malignancy (except non melanoma skin cancer or carcinoma in situ of the cervix) or life threatening disease. If there is a history of prior malignancies or life threatening diseases, the patient must be disease free for at least 5 years. Subjects must not have had prior systemic therapy except for localized emergency radiation to sites of life-threatening or function-threatening disease and/or no more than 1 cycle of chemotherapy per a low or intermediate risk neuroblastoma regimen (as per P9641, A3961, ANBL0531, or similar) prior to determination of MYCN amplification status and histology. Other serious or life-threatening conditions deemed unacceptable by the principal investigator History of life threatening or recurrent thrombosis/embolism; patients may participate if they are on anticoagulation during the treatment Evidence of immediate life-threatening disease or a life expectancy of less than 3 months Uncontrolled active life-threatening infection. Known intolerance to or life threatening side effects resulting from prior checkpoint inhibitor therapy Active life-threatening infection Patient has malignancy or life-threatening systemic disease or a history of advanced, serious, life-threatening malignancy/disease within the last 5 years, except very low-risk prostate cancer Active life-threatening infection Patients with an impending, life-threatening cerebral herniation syndrome, based on the assessment of the study neurosurgeon Active life-threatening infection Patients with an impending, life-threatening cerebral herniation syndrome, based on the assessment of the study neurosurgeons or their designate Has an uncontrolled, life-threatening active infection No clinical evidence of life-threatening infection Patients with untreated or uncontrolled life-threatening infection Active life-threatening infection Patients must not have untreated or uncontrolled life-threatening infection No life threatening parenchymal disease or rapidly progressing disease warranting cytotoxic chemotherapy Active life-threatening infection Unstable or life-threatening arrhythmia Patients with other conditions not related to CMV infection (e.g. uncontrolled bacterial sepsis or invasive fungal infection) which are also life-threatening and which would preclude evaluation of the effects of a T-cell infusion. Active life-threatening infection Significant extrahepatic disease representing an imminent life-threatening outcome Active life-threatening cancer requiring treatment other than ALL MATCHED RELATED DONOR: No history of life-threatening opportunistic infection HAPLOIDENTICAL RELATED DONOR: No history of life-threatening opportunistic infection Active life-threatening infection No life- or organ-threatening manifestations of MCD Active life-threatening infection Severe life, threatening infection Severe life, threatening infection Significant extrahepatic disease representing an imminent life-threatening outcome HAPLOIDENTICAL RELATED DONOR: No history of life-threatening opportunistic infections Active life-threatening infection Significant extrahepatic disease representing an imminent life-threatening outcome Significant extrahepatic disease representing an imminent life threatening outcome Patients with an uncontrolled life-threatening infection Patients with life-threatening condition or complication other than their basic condition Known life-threatening systemic disease Evidence of immediately life-threatening disease, progressively fatal disease, or life expectancy of 3 months or less (eg, moribund or with shock unresponsive to fluid replacement) Other life-threatening illness that is expected to impact life expectancy within 3 years Unstable or life-threatening arrhythmia Presence of any life-threatening co-morbidity Presence of any life-threatening co-morbidity Active life-threatening infection Immediately life-threatening, severe complications of leukemia. Patients must not have untreated or uncontrolled life-threatening infection Participants must not have life-threatening co-morbidities Uncontrolled, life-threatening infection that is not responding to antimicrobial therapy Active life-threatening infection Any subject who has a life-threatening condition that requires high-dose immunosuppressant(s) Other serious or life-threatening conditions deemed unacceptable by the principal investigator Patients must not have untreated or uncontrolled life-threatening infection History of life threatening or recurrent thrombosis/embolism; subjects may participate if they are adequately anticoagulated during the treatment No untreated or uncontrolled life-threatening infection Severe or life-threatening infection within 2 weeks of entry onto the study Uncontrolled, life-threatening infection that is not responding to antimicrobial therapy Patients with an uncontrolled life-threatening infection Evidence of immediately life-threatening disease, progressively fatal disease, or life expectancy of 3 months or less. Uncontrolled life-threatening infections Any life-threatening condition that could affect protocol compliance. Uncontrolled, life-threatening infection that is not responding to antimicrobial therapy Subject has an active, uncontrolled systemic infection considered opportunistic, life-threatening, or clinically significant at the time of treatment. are eligible for any standard therapy known to be life prolonging or life saving Uncontrolled, life-threatening infection that is not responding to antimicrobial therapy Evidence of life-threatening or fulminant CDAD. Patients must have had no prior systemic therapy except for localized emergency radiation to sites of life-threatening or function-threatening disease and/or no more than 1 cycle of chemotherapy per low- or intermediate-risk neuroblastoma therapy (P9641, A3961, ANBL0531) prior to determination of MYCN amplification and histology Known severe or life-threatening allergy or intolerance to ATG or cyclosporine/ tacrolimus History of life threatening or recurrent thrombosis/embolism; patients may participate if they are on anticoagulation during the treatment Patients with other conditions not related to CMV infection (e.g. uncontrolled bacterial sepsis or invasive fungal infection) which are also life-threatening and which would preclude evaluation of the effects of a T-cell infusion Subjects must be free of life-threatening illness (e.g., cancer) that would severely limit participation; those with chronic illnesses (e.g., asthma, diabetes) may participate with the permission of their physician Have current or a history of ventricular or life-threatening arrhythmias or diagnosis Current metabolic or life-threatening disease Untreatable life-threatening arrhythmias Any other severe or life-threatening comorbidity that could increase the risk of bronchoscopic biopsy or ATV tunneling, for example: Acute life threatening infection