The Pertussis resurgence: putting together the pieces of the puzzle

Area of Science:

• Immunology
• Epidemiology
• Vaccinology

Background:

• Pertussis (whooping cough) incidence is increasing globally.
• This rise occurs despite widespread use of acellular pertussis (aP) vaccines.
• Existing explanations like waning immunity and improved diagnostics are insufficient.

Purpose of the Study:

• To investigate the reasons behind the resurgence of pertussis.
• To explore the role of differing immune responses between aP and whole-cell pertussis (wP) vaccines.
• To determine if aP vaccines' lack of mucosal immunity contributes to pertussis incidence.

Main Methods:

• Comparative analysis of immune responses induced by aP versus wP vaccines.
• Review of epidemiological data on pertussis incidence trends.
• Assessment of vaccine-induced immunity, including mucosal immunity.

Main Results:

• Immune responses to aP vaccines differ fundamentally from those induced by wP vaccines.
• aP vaccines do not appear to induce significant mucosal immunity.
• These differences may be a critical factor in the observed pertussis resurgence.

Conclusions:

• The shift from wP to aP vaccines may be a key driver of the current pertussis epidemic.
• Lack of mucosal immunity following aP vaccination warrants further investigation.
• Understanding these vaccine-induced immune differences is crucial for controlling pertussis.