Bi-OPV Oral Vaccine is used in the prevention of polio. It protects against poliomyelitis causing poliovirus. Polio or poliomyelitis is a crippling and potentially deadly infectious disease. The virus spreads from person to person and can invade an infected person's brain and spinal cord, causing paralysis. The first dose of Bi-OPV Oral Vaccine is given at birth. Primary three doses of this vaccine are given at 6, 10, and 14 weeks of child's age. This is followed by two booster doses, one at 16-24 months of age and others at five years of age. In addition to these, do not forget to immunize your child during all pulse polio immunization days. The vaccine is administered multiple times to ensure full protection. There is no risk of overdose and very minimal risk of adverse effects. However, some children may experience vomiting, fever, and diarrhea. Let your child's doctor know if your child experiences any such symptoms.