Nano/microparticle Formulations for Universal Influenza Vaccines

Area of Science:

• Vaccinology
• Nanotechnology
• Virology

Background:

• Influenza poses a significant global health threat, causing severe illness and death.
• Current seasonal influenza vaccines exhibit limited efficacy and necessitate annual updates due to viral evolution.
• Universal influenza antigens (M2e, HA stalk) offer broader protection but often lack sufficient antigenicity.

Purpose of the Study:

• To review nano/microparticle-based vaccine formulations for influenza.
• To highlight the fabrication, characterization, and immunogenicity of these advanced vaccine systems.
• To discuss future perspectives for universal influenza vaccine delivery.

Main Methods:

• Review of scientific literature on nano/microparticle carriers for influenza vaccines.
• Analysis of various materials used in particle fabrication (polymers, liposomes, metals, proteins).
• Evaluation of immune responses and protection in animal models (mice, pigs, ferrets, chickens).

Main Results:

• Nano/microparticles significantly enhance the antigenicity of universal influenza antigens.
• Diverse particle types demonstrate efficacy in inducing immunity and protection across multiple animal models.
• Physicochemical properties, fabrication methods, and biological responses are detailed for various formulations.

Conclusions:

• Nano/microparticle carriers are a promising strategy to improve the efficacy of universal influenza vaccines.
• Further research into material science and delivery systems can optimize influenza vaccine design.
• Addressing challenges in antigenicity and delivery is crucial for developing next-generation influenza vaccines.