Why was smallpox easily eradicated?
Several biological reasons favored the eradication of smallpox, the most important of which were probably that recurrent infectivity did not occur, that there was no animal reservoir, and that an effective stable vaccine was available.
How long did it take to eliminate polio?
Thanks to the polio vaccine, dedicated health care professionals, and parents who vaccinate their children on schedule, polio has been eliminated in this country for more than 30 years. This means that there is no year-round transmission of poliovirus in the United States.
What is the only virus to be eradicated worldwide?
Widespread immunization and surveillance were conducted around the world for several years. The last known natural case was in Somalia in 1977. In 1980 WHO declared smallpox eradicated – the only infectious disease to achieve this distinction.
Has Polio been eradicated from the world?
Wild poliovirus has been eradicated in all continents except Asia, and as of 2020, Afghanistan and Pakistan are the only two countries where the disease is still classified as endemic.
Has polio been eradicated in us?
Elimination in the U.S. Polio has been eliminated from the United States thanks to widespread polio vaccination in this country. This means that there is no year-round transmission of poliovirus in the United States. Since 1979, no cases of polio have originated in the United States.
Is polio eliminated or eradicated?
Wild poliovirus has been eradicated in all continents except Asia, and as of 2020, Afghanistan and Pakistan are the only two countries where the disease is still classified as endemic….Timeline.
| Year | Estimated | Recorded |
|---|---|---|
| 1985 | — | 38,637 |
| … | ||
| 1988 | 350,000 | 35,251 |
| … |
Why polio is not eradicated in Pakistan?
Policy issues. Besides militancy, experts also blame a flawed government policy for polio’s continued existence in Pakistan. Dr. Adnan Khan, an Islamabad-based researcher on infectious disease and public health, says bad governance is one of the reasons behind the failure of Pakistan’s polio eradication program.
How long does it take for smallpox to eradicate?
Eradication and prevention. The first smallpox immunization was created by Edward Jenner in 1796. But it took more than 200 years and a worldwide vaccination program to eradicate the disease.