Explanation:

Both the statements are correct.
World Polio Day was established by Rotary International over a decade ago to commemorate the birth of Jonas Salk, who led the first team to develop a vaccine against poliomyelitis.
About Polio-
Polio is a crippling and potentially fatal infectious disease. There is no cure, but there are safe and effective vaccines. Polio can be prevented through immunization. Polio vaccine, given multiple times, almost always protects a child for life. The strategy to eradicate polio is therefore based on preventing infection by immunizing every child until transmission stops and the world is polio-free.