Consider the following diseases: (1) Diphtheria (2) Chickenpox (3) Smallpox Which of the above diseases has/have been eradicated in India?
3 only
Identifying Eradicated Diseases in India
Let's analyze each disease listed in the question to determine if it has been eradicated in India.
The diseases mentioned are:
- Diphtheria
- Chickenpox
- Smallpox
Analysis of Disease Status in India
Diphtheria Status in India
Diphtheria is a serious bacterial infection that affects the nose, throat, and sometimes skin. It is preventable by vaccination. While there is an effective vaccine against diphtheria, cases still occur in various parts of the world, including India. Therefore, Diphtheria has not been eradicated in India.
Chickenpox Status in India
Chickenpox is a highly contagious disease caused by the varicella-zoster virus. It is generally a mild illness but can be severe in some cases. A vaccine is available for chickenpox. Although widespread vaccination programs exist, Chickenpox is still prevalent in India and has not been eradicated.
Smallpox Status in India
Smallpox was a devastating infectious disease caused by the variola virus. Thanks to a global vaccination campaign led by the World Health Organization (WHO), Smallpox was successfully eradicated. India played a significant role in this global effort. India was officially declared Smallpox-free in 1977. The global eradication of Smallpox was certified in 1980. Therefore, Smallpox has been eradicated in India.
Summary of Eradication Status
Based on the analysis:
- Diphtheria: Not eradicated in India.
- Chickenpox: Not eradicated in India.
- Smallpox: Eradicated in India.
The question asks which of the diseases have been eradicated in India. Only Smallpox from the given list fits this criterion.
Comparing this with the options provided:
- Option 1: 1 and 2 only (Diphtheria and Chickenpox) - Incorrect, neither is eradicated.
- Option 2: 3 only (Smallpox) - Correct, Smallpox is eradicated in India.
- Option 3: 1, 2 and 3 (Diphtheria, Chickenpox, and Smallpox) - Incorrect, only Smallpox is eradicated.
- Option 4: None - Incorrect, Smallpox is eradicated.
Thus, only Smallpox has been eradicated in India among the given diseases.
Revision Table: Disease Eradication in India
| Disease | Eradicated in India? | Notes |
|---|---|---|
| Diphtheria | No | Vaccine-preventable, but cases still occur. |
| Chickenpox | No | Common viral illness, still prevalent. |
| Smallpox | Yes | Globally eradicated, India declared free in 1977. |
Additional Information on Disease Eradication
It's important to understand the difference between 'eradication' and 'elimination'.
- Eradication: This refers to the complete and permanent worldwide reduction to zero of new cases of a disease through deliberate efforts. Once eradicated, intervention measures are no longer needed. Smallpox is an example of a globally eradicated disease.
- Elimination: This refers to the reduction to zero (or a very low defined target rate) of new cases of a specific disease in a defined geographical area as a result of deliberate efforts. However, intervention measures (like vaccination or surveillance) may still be needed to prevent re-establishment of transmission. Polio is an example of a disease eliminated in India, though global eradication is still ongoing. Measles and Rubella are also targets for elimination.
The eradication of Smallpox is considered one of the greatest public health achievements in history, highlighting the power of vaccination and international cooperation.
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