Factors contributing to pertussis resurgence

Area of Science:

• Immunology
• Infectious Diseases
• Vaccinology

Background:

• Pertussis (whooping cough) remains a significant global health threat, causing substantial mortality and morbidity despite extensive vaccination efforts.
• A concerning resurgence of pertussis is evident even in populations with high immunization rates, particularly affecting adolescents and adults who can transmit the disease to vulnerable infants.

Purpose of the Study:

• To summarize recent findings on the factors contributing to the resurgence of pertussis in highly immunized populations.
• To discuss the implications of antigenic divergence between vaccine strains and circulating pertussis bacteria.

Main Methods:

• Review of existing literature and surveillance data on pertussis epidemiology.
• Analysis of studies investigating vaccine-induced immunity duration and bacterial evolution.

Main Results:

• Multiple factors contribute to pertussis resurgence, including increased disease awareness, improved diagnostics, enhanced surveillance, and waning vaccine immunity.
• Antigenic divergence between pertussis vaccine strains and contemporary clinical isolates has been identified in numerous countries with high vaccination coverage.

Conclusions:

• The resurgence of pertussis is a complex issue driven by immunological and microbiological factors.
• Understanding these factors, including antigenic drift, is crucial for developing effective strategies to control pertussis in vaccinated populations and protect infants.