Use of antibiotics to treat chronic infections within 28 days prior to first dose Active systemic infections requiring antibiotics Repeated infections requiring oral or i.v. antibiotics Active or fungal infections requiring systemic treatment within 7 days prior to screening Acute or chronic infections requiring systemic therapy, including, among others: Has an active infection requiring systemic therapy (apart from cutaneous infections). Systemic infection requiring chronic maintenance or suppressive therapy Significant acute or chronic infections requiring systemic therapy Documented infections or oral temperature > 38.2 degree Celsius (C) fewer than 72 hours prior to receiving study treatment or systemic infection requiring chronic maintenance therapy; however, if these problems resolve, the start of treatment can be initiated on a delayed schedule No active infections requiring systemic antibiotics Known active infections or oral temperature > 38.2 Celsius (C) fewer than 72 hours prior to receiving study treatment or systemic infection requiring chronic maintenance or suppressive therapy Active infections requiring therapy, including HIV, hepatitis Histry of significant chronic or recurrent infections requiring treatment Acute or chronic infections requiring systemic therapy, including, among others: Has an active infection requiring systemic therapy or history of repeated infections Systemic infection requiring chronic maintenance or suppressive therapy Serious, active infections requiring treatment with IV antibiotics Acute infections requiring parenteral therapy Patients with known systemic infections requiring antibiotics or chronic maintenance/suppressive therapy Patients with systemic infections requiring active therapy within 72 hours of lymphodepletion Patients with active systemic infections requiring antibiotics or active hepatitis A, B, or C. No active infections requiring systemic therapy Infections or intercurrent illness requiring active therapy Patients who have active infections requiring therapy. Patients with active infections requiring systemic treatment. Active infections requiring systemic antibiotics. Active infections requiring systemic antibiotics. certain heart problems, active or chronic infections, serious significant diseases, AIHA requiring treatment, other current cancer or within last 5 years Active infection requiring systemic treatment or any uncontrolled infections =< 14 days prior to enrollment Active infections prior to receiving study treatment or systemic infection requiring chronic maintenance or suppressive therapy Active or chronic recurrent systemic infections that require continuous antimicrobial therapy during the Kevetrin study period Active infections requiring antibiotics Patients with systemic infections requiring antibiotics or chronic maintenance/suppressive therapy Chronic or current active infections requiring systemic antibiotics, antifungals or antiviral therapy Patients with active systemic infections requiring antibiotics or chronic maintenance/suppressive therapy; once the infection in question has resolved and patient is off antimicrobial treatment, patients may participate Active infections requiring systemic therapy Subject has known or suspected HIV or other active infections requiring acute or chronic treatment with systemic antibiotics. Conditions requiring topical antibiotics are acceptable. Active, uncontrolled infections within 7 days of study entry requiring systemic therapy.