Booster vaccination strategy: Necessity, immunization objectives, immunization strategy, and safety

Area of Science:

• Immunology
• Epidemiology
• Vaccinology

Background:

• The global COVID-19 pandemic persists, necessitating ongoing control measures.
• Current COVID-19 vaccines are crucial for herd immunity but exhibit waning efficacy over time.
• The need for booster vaccinations to sustain immunity remains under investigation.

Purpose of the Study:

• To evaluate the necessity and optimal strategy for COVID-19 vaccine booster doses.
• To analyze existing data on vaccine effectiveness and immune persistence.
• To identify priority populations for booster vaccinations.

Main Methods:

• Systematic review and meta-analysis of existing COVID-19 vaccine data.
• Analysis of neutralizing antibody levels and vaccine effectiveness over time.
• Comparative assessment of homologous versus heterologous booster strategies.

Main Results:

• Booster vaccination is necessary to reinforce the immune barrier against COVID-19.
• High-risk groups, including the elderly and immunocompromised, should be prioritized for boosters.
• Heterologous boosters may elicit superior immune responses compared to homologous boosters.

Conclusions:

• A booster vaccination strategy is recommended for sustained COVID-19 protection.
• Targeted booster administration to high-risk populations is crucial.
• Further research is required to confirm the safety and efficacy of heterologous COVID-19 booster vaccinations.