Which of the following diseases CANNOT be prevented by vaccination?

DSSSB - 29 August 2019 (Shift-2)

Applied Microbiology & Infection control

Easy

Appeared in: DSSSB - 29 August 2019 (Shift-2)

Explanation

AIDS (Acquired Immunodeficiency Syndrome) is the final stage of infection with the Human Immunodeficiency Virus (HIV).
Currently, there is no licensed vaccine to prevent HIV infection or treat those who have it.
The virus's ability to rapidly mutate and integrate into the host's genome makes vaccine development exceptionally challenging.
Prevention strategies for HIV/AIDS are centered on behavioral changes (e.g., condom use, sterile needles) and biomedical interventions like Pre-Exposure Prophylaxis (PrEP) and Post-Exposure Prophylaxis (PEP).

Option A: Tetanus is a well-known vaccine-preventable disease. The tetanus toxoid vaccine is highly effective and part of routine immunization schedules worldwide (e.g., DTaP, Tdap, Td).
Option B: Influenza is preventable through vaccination. Annual flu shots are recommended for most of the population to protect against seasonal influenza viruses.
Option C: Diphtheria is a bacterial infection that is preventable with the diphtheria toxoid vaccine, which is a standard component of childhood combination vaccines like DTaP.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Vaccine-Preventable Diseases as background academic context rather than a clinical decision trigger.
A nurse's role is crucial in educating patients about the importance of adhering to immunization schedules for preventable diseases like tetanus, diphtheria, and influenza.
For non-vaccine-preventable diseases like HIV/AIDS, nursing education is paramount for prevention, focusing on risk reduction, safe practices, and the availability of PrEP and PEP.
Nurses are often the first point of contact for post-exposure incidents (e.g., needlestick injuries) and must be knowledgeable about the protocol for PEP to prevent HIV transmission.

How to Approach the Question

First, carefully read the question and identify the negative keyword "CANNOT". This signals that you are looking for the exception among the options.
The question asks which disease is NOT preventable by a vaccine.
Systematically evaluate each option based on your knowledge of common immunizations.
Consider Tetanus: Recall the common 'tetanus shot', which is a vaccine. This option is likely incorrect.
Consider Influenza: Recall the annual 'flu shot'. This is also a vaccine. This option is likely incorrect.
Consider Diphtheria: Recall that this is part of the standard DTaP childhood vaccine series. This option is likely incorrect.

Concept Tested & Keywords

Concept Tested: Vaccine-Preventable Diseases
Stem keywords: diseases, prevented, vaccination
Lead-in keywords: CANNOT
Negative lead-in flag: The question asks to identify the disease for which there is no vaccine available.

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