Re: CAR-T /MNTA Besides the approx $500k for the initial treatment, the patients' immune system will be crippled. The patients will need boosting immunoglobulin treatment every 3 to 4 weeks (possibly for life) at a cost of about $10K per treatment.MNTA’s M254 (hyper-sialylated Fc—a cheaper, recombinant alternative to plasma-derived IVIG) could potentially help with this problem.