Changing pertussis epidemiology: everything old is new again

Area of Science:

• Public Health
• Infectious Diseases
• Vaccinology

Background:

• Pertussis (whooping cough) was historically a common childhood illness before widespread vaccination campaigns.
• Vaccination significantly reduced pertussis incidence, but the disease is now experiencing a resurgence globally.
• Current acellular pertussis vaccines have been in use for two decades, prompting re-evaluation.

Purpose of the Study:

• To investigate the effectiveness of current acellular pertussis vaccines.
• To assess the durability of protection conferred by these vaccines.
• To determine the role of vaccine characteristics in the ongoing pertussis resurgence.

Main Methods:

• Review of recent epidemiological data on pertussis incidence.
• Analysis of vaccine effectiveness studies.
• Evaluation of immunological data on vaccine-induced immunity duration.

Main Results:

• Emerging data suggest waning immunity from acellular pertussis vaccines.
• The duration of protection may be shorter than previously assumed.
• These factors appear to contribute to the resurgence of pertussis.

Conclusions:

• The effectiveness and durability of acellular pertussis vaccines require ongoing monitoring.
• Understanding vaccine performance is crucial for strategies to control pertussis resurgence.
• Further research is needed to optimize pertussis vaccination schedules and vaccine formulations.