Which vaccine type contains a weakened form of a living microorganism that can usually produce strong, long-lasting immunity?
Correct answer: A. Live attenuated vaccine
- A. Live attenuated vaccine
- B. Inactivated whole-cell vaccine
- C. Toxoid vaccine
- D. Subunit vaccine
Explanation
Live attenuated vaccines contain weakened organisms that can multiply to a limited extent and stimulate cellular and humoral immunity. Toxoids contain inactivated toxins, while subunit and inactivated vaccines do not contain live organisms.
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About Immunisation and EPI
Immunisation covers active and passive immunity, vaccine types, routine childhood schedules under Pakistan’s Expanded Programme on Immunization, administration routes and age-based timing. It also includes cold-chain maintenance, contraindications, adverse events following immunisation, missed doses and the distinction between vaccine protection and treatment of an established infection.
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