When hypothesis are confirmed by varied tests then it becomes theory. A theory is always backed by evidence; a hypothesis is only a suggested possible outcome, and is testable and falsifiable.

World Polio Day is observed annually on October 24th. This day is dedicated to raising awareness about the importance of polio vaccination and efforts to eradicate polio worldwide. It is an opportunity to celebrate the progress made in the fight against polio and to renew commitments to end this crippling disease.