Poliomyelitis or polio is a viral infection that can cause paralysis. It remained a widespread threat until the US physician Jonas Salk developed polio vaccine. It was first successfully used at a trial in 1952 and the Salk vaccine finally received approval in 1955 after further trials.
The more commonly used vaccine against polio that is administered orally was developed by a Polish-US physician Albert Sabin. The vaccine contains weakened polio virus that builds immunity without harming the body. As one of the most necessary medications required in a basic health system, it has been added to WHO’s list of essential medicines.
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