Development of a transmission-blocking malaria vaccine: progress, challenges, and the path forward

Area of Science:

• * Malariology and Vaccinology
• * Infectious Disease Control and Elimination

Background:

• * Malaria continues to cause significant morbidity and mortality globally.
• * New interventions are essential for malaria elimination and eradication.
• * Vaccines that interrupt malaria transmission (VIMT) are critical for breaking the parasite cycle.

Purpose of the Study:

• * To review progress in the development of sexual, sporogonic, or mosquito stage-targeting VIMTs (SSM-VIMTs) since 2010.
• * To identify key challenges hindering the licensure of SSM-VIMTs.
• * To outline essential next steps for advancing SSM-VIMTs towards malaria eradication.

Main Methods:

• * Literature review of scientific progress in SSM-VIMT development.
• * Analysis of challenges in regulatory pathways for transmission-blocking vaccines.
• * Synthesis of current research and future directions.

Main Results:

• * Significant advancements have been made in SSM-VIMT research and development since 2010.
• * Regulatory pathways for vaccines targeting transmission, not just clinical disease, remain ill-defined.
• * Key scientific and logistical challenges persist in SSM-VIMT development and deployment.

Conclusions:

• * SSM-VIMTs hold immense potential for malaria elimination and eradication.
• * Addressing regulatory and developmental challenges is crucial for realizing this potential.
• * Strategic next steps are needed to accelerate the contribution of SSM-VIMTs to global malaria control.