Question

deliver therapeutic genetic material to target cells, but these vectors can trigger immune responses that neutralize the treatment. to overcome this limitation, researchers modify the protein shells that enclose a viruss genetic material, called viral capsids, or combine specific components from different variations of the virus within the same species. this engineering approach allows the therapeutic genes to enter cells while reducing the impact of pre - existing immunity, though immune responses may still affect the possibility of subsequent treatments. which choice best states the main idea of the text? choose 1 answer: a gene therapy researchers have discovered that combining components from different viral species allows them to avoid triggering immune responses to viral vectors. b studies of viral modification techniques have revealed that immune responses pose a substantial challenge to successful gene therapy delivery. c researchers are developing modified viral delivery systems that may reduce but not eliminate immune system interference with gene therapy treatments. d scientists studying gene therapy have found that modifications to

Explanation:

The text first mentions the problem of immune responses neutralizing gene - therapy due to viral vectors. Then it describes how researchers modify viral capsids or combine components to reduce the impact of pre - existing immunity, while also noting that immune responses may still affect subsequent treatments. Option C best captures this overall idea.

Answer:

C. Researchers are developing modified viral delivery systems that may reduce but not eliminate immune system interference with gene therapy treatments.