EVERYDAY SCIENCE

Detailed explanation-1: -The last known natural case was in Somalia in 1977. In 1980 WHO declared smallpox eradicated – the only infectious disease to achieve this distinction. This remains among the most notable and profound public health successes in history.

Detailed explanation-2: -Smallpox Virus Thanks to the success of vaccination, the last natural outbreak of smallpox in the United States occurred in 1949. In 1980, the World Health Assembly declared smallpox eradicated (eliminated), and no cases of naturally occurring smallpox have happened since.

Detailed explanation-3: -In 1980, this syndrome was declared as completely eradicated after the global immunization campaign led by the World Health Organization (WHO) with the help of the smallpox vaccine. The first effective vaccine to be discovered was the smallpox one as it was developed in 1796 by Edward Jenner.

Detailed explanation-4: -The Program made steady progress toward ridding the world of this disease, and by 1971 smallpox was eradicated from South America, followed by Asia (1975), and finally Africa (1977).

Detailed explanation-5: -Through vaccination, the disease was eradicated in 1980. However, research for effective vaccines, drugs and diagnostics for smallpox continues in the event it is used as a bioterror weapon. The last naturally occurring case of smallpox was reported in 1977.