World Polio Day was this week. This day commemorated global efforts toward a polio-free future, as well as the selfless sacrifices of those working on the frontline of the battle to eradicate polio from every corner of the world. Polio is contagious due to the ease with which the poliovirus spreads. Although the virus is now exceedingly rare because of modern interventions, it can impair the brain regions that govern respiration, resulting in death. Polio, which has no recognized therapy, can only be avoided through vaccination.