Related Experiment Videos
Immunization of neonates with trivalent oral poliomyelitis vaccine (Sabin)
Insights
Administering trivalent live, oral polio vaccine to neonates at 3 days of age effectively induces poliovirus immunity. Early infant immunization with oral polio vaccine establishes robust antibody levels and broad protection against poliovirus.
Area of Science:
- Immunology
- Vaccinology
- Pediatrics
Background:
- Neonatal immunization is crucial for early protection against infectious diseases.
- Polio remains a significant public health concern, necessitating effective vaccination strategies.
- Understanding the immunological response in neonates to oral polio vaccine is vital for optimizing immunization schedules.
Purpose of the Study:
- To evaluate the immunological effects of administering trivalent live, oral polio vaccine to healthy neonates.
- To determine the antibody response and seroconversion rates following different doses of oral polio vaccine in neonates.
- To assess poliovirus excretion in neonates post-vaccination.
Main Methods:
- A cohort of 200 healthy neonates in Henan Province, China, received trivalent live, oral polio vaccine.
- Vaccination commenced at 3 days of age, with subsequent doses administered.
- Antibody levels, geometric mean titres, and poliovirus excretion were monitored at various time points.
- A control group received their initial vaccine dose at 2 months of age for comparison.
Main Results:
- Antibody detection rates increased significantly after each dose, reaching nearly 100% after the fourth dose.
- High geometric mean titres were observed for all three poliovirus types post-vaccination.
- Poliovirus excretion was common after initial doses, increasing to 99% after the second dose.
- Neonatal immunization induced immunity at the earliest possible age, comparable to controls vaccinated later.
Conclusions:
- Early administration of oral polio vaccine to neonates is immunologically effective.
- Neonatal immunization with oral polio vaccine induces protective antibody levels at a very young age.
- This strategy offers the potential for earlier protection against poliomyelitis in infants.
Abstract:
A study was carried out between November 1981 and April 1982 on the immunological effect of administering trivalent live, oral polio vaccine to 200 mature healthy neonates from Henan Province, China. The initial dose of vaccine was given at 3 days of age, and 2 months thereafter antibodies to poliovirus types 1, 2, and 3, respectively, were detected in 46.7%, 60.7% and 48.6% of the neonates; after the second dose, the levels were 86.9%, 95.3%, and 97.2%, with geometric mean titres of 1:106.2, 1:349.8, and 1:232.5. Almost 100% of neonates exhibited antibodies after the fourth dose of vaccine. Eighty-two percent of the neonates excreted poliovirus for at least a week after the initial dose of vaccine, and this increased to 99% after the second dose. Seroconversion at 4 months of age was similar to that of a group of controls who received their initial dose of vaccine at 2 months of age; however, immunization of neonates induced immunity to poliovirus at the earliest possible age.