#DYK❓ #Polio is a highly infectious disease that can cause permanent paralysis or death. Serious outbreaks affected hundreds of thousands of children worldwide every year until vaccines became available in the 1950s. Since the year 2000, global vaccination campaigns have led to a 99.9% decline in the number of wild #poliovirus cases worldwide. #WHO75 #HealthForAll #VaccinesWork 📸 (in order) - A boy puts on leg braces that reinforce muscles damaged by poliomyelitis in #Denmark, 1952 WHO / Eric Schwab - A polio vaccination team supervisor in #Afghanistan, 2016 WHO / Rada Akbar