Sagot :
Answer:
OPV produces antibodies in the blood ('humoral' or serum immunity) to all three types of poliovirus, and in the event of infection, this protects the individual against polio paralysis by preventing the spread of poliovirus to the nervous system.
Explanation:
Answer:
OPV is safe, effective and is the essential tool available to protect all children against polio. It has no common side effects and has been used all over the world to protect children against polio. Over the last 20 years, this vaccine has saved 5 million people from permanent paralysis by polio.
Explanation: