Which statement about antibodies received passively by an infant is correct?
Correct answer: B. They usually provide temporary protection without lasting memory
- A. They are produced by the infant’s own memory cells
- B. They usually provide temporary protection without lasting memory
- C. They always provide lifelong protection against infection
- D. They are formed only after the infant receives a live vaccine
Explanation
Passive antibodies are transferred from another person or given as immunoglobulin, so they provide immediate but usually temporary protection. They do not stimulate the infant to form the same durable immune memory as active immunisation.
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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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