Oral Polio Vaccine (OPV)
Oral Polio Vaccine (OPV) consists of a mixture of live attenuated poliovirus strains of each of the three serotypes, selected by their ability to mimic the immune response following infection with wild polioviruses, but with a significantly reduced incidence of spreading to the central nervous system. It is available in India in multi dose of 20 doses per pack.
DOSAGE AND ADMINISTRATION :
2 drops (0.1 ml) of the vaccine is administered orally to small child starting from 10 days of birth. and is given 3 times at an interval of 1-2 months .
The vaccine must be stored at -200C or below under frozen state for long term storage upto 2 years. When the vaccine is thawed ( liquid form), it must be kept in refrigerator at 20C to 80C. Vaccine if stored at 20C to 80C shall remain good for only 4-6 months.