1st, there is a confined number of transplantable cells, and an productive strategy for collecting them hasn't but been identified. There's also an issue with locating a fitting antigen-matched donor for transplantation, and viral contamination or any immunoreactions also cause a reduction i
"Among the points I realised on the next evening my Mind was incredibly awake, in the simplest way achievable. It felt like I was solving planet troubles in my head."
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