Read the following text and answer the following question on the basis of the same:
Shivani studies in class I. Her parents come from a backward family and are unaware of immunization programme. So, she did not get vaccinated properly. Once playing with her friends in the park, she fell down due to weakness and later complained of high fever, head ache and stiffness in her neck.
Which vaccine if administered earlier, would have saved Shivani from the illness she contracted unfortunately?

Options

A. MMR Vaccine
B. Varicella Vaccine
C. BCG Vaccine
D. Salk Vaccine

Explanation

To answer the question regarding which vaccine, if administered earlier, would have saved Shivani from her illness, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Symptoms**: The text mentions that Shivani experienced high fever, headache, and stiffness in her neck. The stiffness in the neck is particularly significant as it can indicate a serious condition.

2. **Recognize the Possible Illness**: Stiffness in the neck is a classic symptom of meningitis, which can be caused by various pathogens, including viruses. However, given the context of immunization and the age of Shivani, we should consider common vaccine-preventable diseases.

3. **Consider Vaccine-Preventable Diseases**: Among the diseases that can cause similar symptoms, polio is a notable one. Polio can lead to paralysis and other serious complications, including meningitis-like symptoms.

4. **Identify the Relevant Vaccine**: The Salk vaccine, which is an injectable polio vaccine, is designed to prevent poliomyelitis. If Shivani had received this vaccine during her early childhood, it could have protected her from contracting polio.

5. **Conclusion**: Based on the symptoms and the context of immunization, the vaccine that would have saved Shivani from her illness is the **Salk vaccine**.

### Final Answer:
The vaccine that, if administered earlier, would have saved Shivani from the illness she contracted is the **Salk vaccine**.

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