Vaccination into the Dermal Compartment: Techniques, Challenges, and Prospects.

Area of Science:

• Immunology
• Vaccinology
• Dermatology

Background:

• The World Health Organization identified influenza pandemics and vaccine hesitancy as major global health threats in 2019.
• The skin, with its immune-rich environment, is an ideal site for vaccination, capable of eliciting both humoral and cellular immune responses.

Purpose of the Study:

• To review diverse vaccination techniques targeting the dermal compartment.
• To discuss the current status, challenges, and future prospects of these techniques.
• To explore vaccine formulations optimized for dermal delivery.

Main Methods:

• Overview of needle and syringe techniques.
• Discussion of microneedles, DNA tattooing, jet, and ballistic delivery systems.
• Examination of skin permeabilization techniques: thermal ablation, chemical enhancers, electroporation, iontophoresis, and sonophoresis.

Main Results:

• The skin offers a promising site for vaccination, potentially overcoming challenges posed by pandemics and hesitancy.
• Various novel delivery systems are being developed to enhance immune responses and enable dose-sparing.
• Optimized formulations are crucial for maximizing the benefits of dermal vaccination.

Conclusions:

• Dermal vaccination presents a significant opportunity to advance global public health strategies.
• Further research and development in delivery techniques and formulations are essential for clinical translation.
• Exploring the skin as a vaccination site can lead to more effective and efficient immunization programs.