Serologic vaccination response after solid organ transplantation: a systematic review

Area of Science:

• Transplantation Medicine
• Immunology
• Vaccinology

Background:

• Infectious diseases are a major complication following solid organ transplantation (SOT).
• Vaccination is a desirable preventive strategy, but evidence on its efficacy in SOT recipients is inconsistent.

Purpose of the Study:

• To systematically review the serologic response rates to various post-transplantation vaccinations in SOT recipients.
• To assess the current evidence base for vaccination guidelines in SOT patients.

Main Methods:

• Systematic review of 72 studies identified from an initial search of 2478 papers.
• Analysis of serologic response rates to vaccines including tetanus, diphtheria, polio, hepatitis A and B, influenza, pneumococcal, meningococcal, and MMR.

Main Results:

• Most clinical trials were small, heterogeneous, and focused on specific SOT populations.
• SOT recipients generally exhibit a lower immune response to most vaccines compared to healthy controls.
• The impaired response varies by vaccine type, recipient age, and transplanted organ; antibody levels may decline rapidly.

Conclusions:

• Current vaccination strategies for SOT recipients are suboptimal and lack strong evidential support.
• Limited knowledge exists regarding vaccination responses in SOT recipients despite numerous studies.
• There is a critical need for large-scale, well-designed vaccination trials in defined SOT cohorts to inform evidence-based guidelines.