How is a functional ADA cDNA introduced into lymphocytes in gene therapy?

How is a functional ADA cDNA introduced into lymphocytes in gene therapy?
  1. By introducing drugs in a person's body
  2. By increasing the immunity of a person
  3. By growing lymphocytes from the blood of the patient in a culture outside the body
  4. By using a retroviral vector

Solution

A functional ADA cDNA is introduced into these lymphocytes using a retroviral vector.

Asked in: NCERT

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