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Recombinant live attenuated vaccine against hepatitis B was prepared from
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- Plasma of chronically infected individual
- Recombinant yeast expressing hepatitis B surface antigen
- Recombinant vaccinia virus expressing hepatitis B surface antigen
- Transgenic plants expressing hepatitis B surface antigen
Correct Option: C
A vaccine vector, or carrier, is weekend virus or bacterium into which harmless genetic material from another disease causing organism can be inserted. The vaccine virus, the virus that causes cowpox, is now used to make recombinant vector vaccines. Vaccinia is relatively large and has ample room to accept additional genetic fragments.
