The disease that has been eradicated from the world is . 

Correct option is D

The correct answer is:(D) Smallpox

Explanation:

• Smallpox is the only disease that has been officially eradicated from the world through an intensive global vaccination program led by the World Health Organization (WHO).

• The last natural case of smallpox occurred in 1977, and the disease was declared eradicated in 1980.

Information Booster:

• Smallpox vaccination has led to the complete eradication of the disease, saving millions of lives.

• Smallpox was caused by the variola virus, and its symptoms included fever, fatigue, and distinctive skin rashes.

• The successful eradication of smallpox remains one of the greatest achievements in public health history.

• Global Smallpox Eradication Program was launched in 1967 and involved mass vaccination campaigns across many countries.

Additional Information:

• Leprosy: While it has been significantly reduced, leprosy has not been eradicated and still exists in some parts of the world.

• Poliomyelitis (Polio): Polio has been nearly eradicated, but a few cases still occur, primarily in Afghanistan and Pakistan.

• Chickenpox: Chickenpox is not eradicated; it is a common viral infection, although a vaccine is available.