Varicella vaccine is a

Appeared in: NHM UP Staff Nurse-2021 Shift-1st

Explanation

The varicella vaccine is a live attenuated vaccine, meaning it contains a weakened (attenuated) form of the live varicella-zoster virus.
This weakened virus is incapable of causing disease in healthy individuals but is sufficient to stimulate a strong, long-lasting immune response that mimics natural infection.
Other common live attenuated vaccines include Measles, Mumps, and Rubella (MMR), Bacille Calmette-Guérin (BCG), and the Oral Polio Vaccine (OPV).

Option A: Killed vaccines contain pathogens that have been completely inactivated. The varicella vaccine uses a live, albeit weakened, virus to provoke an immune response.
Option C: Immunoglobulins provide passive immunity by supplying ready-made antibodies. They do not stimulate the body's own immune system to create long-term memory and protection, which is the function of a vaccine.
Option D: This option is incorrect because a correct classification, 'Live attenuated vaccine', is provided as one of the choices.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of Varicella Vaccine as background academic context rather than a clinical decision trigger.
Nurses must understand the difference between live and killed vaccines to identify contraindications. Live vaccines, like varicella, are generally contraindicated in immunocompromised patients and pregnant women because the weakened virus could potentially cause disease.
Patient education is a key nursing role. Explaining that the varicella vaccine is live helps patients understand potential side effects, such as a mild rash, which can occur as the body builds immunity.
What if? If the patient was a newborn whose mother developed chickenpox 5 days before delivery, the appropriate intervention would be to administer Varicella-Zoster Immunoglobulin (VZIG) to the infant, not the vaccine. This provides immediate passive protection against a severe infection.

How to Approach the Question

Identify the core of the question: It asks for the specific classification of the Varicella (chickenpox) vaccine. This is a factual recall question.
Recall the main categories of vaccines: Live attenuated, Killed (inactivated), Toxoid, and Subunit.
Consider the nature of the varicella vaccine. It uses a weakened form of the live virus.
Evaluate the options based on this knowledge.
Option A, 'Killed vaccine,' is incorrect because the virus is live.
Option C, 'Immunoglobulin,' is a treatment that provides passive antibodies, not a vaccine that stimulates active immunity.

Concept Tested & Keywords

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E6 Pharmacology Nursing Lilley 11e Part 3 p. 154-156

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 204-206

E6 Microbiology Essentials Sastry 4e Part 1 p. 99-101

Practise the full NHM UP Staff Nurse-2021 Shift-1st

Attempt every question from this paper in a timed mock, then review the full solution for each one.