Which type of immunity is acquired by a person after recovering from a natural infection like Chickenpox?

Appeared in: NCL (MP) Nursing Officer - 2020

Explanation

Natural active immunity develops when a person is exposed to a live pathogen, such as the varicella-zoster virus that causes chickenpox.
Following the infection, the body's own immune system actively produces specific antibodies and memory cells.
This 'immunological memory' provides long-lasting, and often lifelong, protection against future infections by the same pathogen.
The question describes a scenario of recovering from a natural infection, which is the definition of acquiring natural active immunity.

Option A: Natural passive immunity involves receiving pre-formed antibodies from another person, not producing them. The body's immune system is not actively involved.
Option B: Artificial active immunity is acquired through medical intervention (vaccination), not through natural exposure to a disease.
Option D: Artificial passive immunity involves the injection of ready-made antibodies. It is both artificial (medically administered) and passive (the body does not produce the antibodies).

Clinical Relevance

Nursing practice connection: Safe nursing care depends on performing Types of Acquired Immunity in the correct sequence, documenting the action clearly, and monitoring for the expected response.
Understanding the different types of immunity is fundamental for nurses in patient education regarding vaccinations, infectious diseases, and maternal-child health.
Nurses apply this knowledge when administering vaccines (artificial active immunity) and explaining their importance for preventing diseases.
It is also crucial for understanding the protection offered to newborns by maternal antibodies (natural passive immunity) and the use of immunoglobulins in post-exposure prophylaxis (artificial passive immunity).

How to Approach the Question

First, identify the key terms in the question: 'recovering from a natural infection' and 'Chickenpox'.
Break down the concept of immunity into its two main components for classification: the source (Natural vs. Artificial) and the body's response (Active vs. Passive).
'Natural' implies the immunity was acquired through everyday life, not a medical procedure.
'Active' implies the person's own immune system produced the antibodies and memory cells.
The scenario 'recovering from a natural infection' perfectly matches the definition of 'Natural Active' immunity.
Evaluate the other options to confirm they do not fit. 'Passive' immunity involves receiving antibodies, and 'Artificial' immunity involves a medical intervention like a vaccine.

Concept Tested & Keywords

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E6 Pharmacology Nursing Lilley 11e Part 3 pp. 148-150, 147-149

E6 Physiology Essentials Sembulingam 10e Part 1 p. 126-128

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