[Immune response to influenza vaccination]

Area of Science:

• Immunology
• Virology
• Public Health

Background:

• Influenza virus poses a significant global health threat.
• Assessing population immunity is crucial for vaccine efficacy evaluation.
• Understanding immune responses to different vaccine formulations is important.

Purpose of the Study:

• To determine pre- and post-vaccination immunity levels against specific influenza strains.
• To compare the immune response elicited by whole virus versus fragmented virus vaccines.
• To evaluate the effectiveness of influenza vaccination in a population.

Main Methods:

• Serological testing to measure antibody titers against A/Chile/1/83, A/Philippines/2/82, and B/URSS/100/83 strains.
• Population sampling before and three months after vaccination.
• Comparative analysis of immune responses between whole and fragmented virus vaccine groups.

Main Results:

• Pre-vaccination titers (≥1/10) were high for A/Chile (54%) and A/Philippines (65.7%), but lower for B/URSS (25.4%).
• Vaccination significantly increased antibody titers, though the response was below expectations.
• Post-vaccination protective titers (≥1/40) were achieved by 65.2% (A/Chile), 74.6% (A/Philippines), and 15% (B/URSS).
• No significant difference in immune response was observed between whole and fragmented virus vaccines.

Conclusions:

• Influenza vaccination enhances population immunity, but efficacy against the B/URSS strain was limited.
• Both whole and fragmented virus vaccines demonstrated comparable immunogenicity.
• Further research may be needed to improve vaccine effectiveness, particularly for certain influenza strains.