Which of the following diseases is now considered completely eradicated from India?

Explanation

Smallpox is an acute, highly communicable disease caused by the Variola virus. It has been eradicated worldwide, including in India. This highly infectious disease typically begins with symptoms like high fever, chills, backache, and headache, followed by the appearance of a rash on the third day of illness. The rash initially appears on the face and then spreads to the rest of the body. It begins as small reddish spots that develop into papules. These papules then progress into small vesicles filled with clear fluid, which later evolve into pustules. Eventually, a scab forms and falls off by the third week, leaving deep pits or scars known as pockmarks. The virus is present in the oral and nasal discharges of patients and is expelled during activities like coughing and sneezing, which can infect healthy individuals.