Do parasite infections interfere with immunisation? A review and meta-analysis

Area of Science:

• Immunology
• Infectious Diseases
• Vaccinology

Background:

• Vaccine responses vary significantly among individuals.
• Concurrent or prior parasitic infections may influence vaccine efficacy.

Purpose of the Study:

• To review and meta-analyze the impact of parasite infections on vaccination outcomes.
• To identify factors influencing parasite-vaccine interactions.

Main Methods:

• Systematic review of experimental and epidemiological literature.
• Meta-analysis of 50 selected studies from 101 reviewed articles.
• Analysis of parasite and vaccine factors influencing immune response.

Main Results:

• Parasite infections during vaccination lead to poorer immunization results.
• Chronic helminth infections have a greater negative impact than acute infections.
• Thymus-dependent vaccines are more vulnerable to parasite interference than thymus-independent vaccines.

Conclusions:

• Parasite infections are a significant factor affecting vaccine efficacy.
• Mitigating parasite infections is crucial for enhancing immunization strategies.
• Accounting for parasite status can lead to more effective vaccination of individuals and populations.