Photograph by Graham Crouch
A man receives the oral polio vaccination (OPV) during a UNICEF campaign in West Bengal, India. Between 1978 and 1995, there were up to 100,000 cases of polio occurring in India every year. In 2014, the country was declared polio-free, thanks to a global effort to reach every person with the vaccine.
There is no cure for polio - a deadly disease that paralyzes its victims for life. However, the disease is only transmitted from human to human and there is a very effective vaccine, making polio an ideal candidate for eradication.
Since 1988, the world has made a coordinated effort to end polio by providing the vaccine to everyone, everywhere. As a result, cases of polio have dropped by 99% in the last two decades. There have only been 15 cases of polio in the entire world in 2017 - a testament to the power of vaccines.