Kang YM, Cho HK, Kim JH, Lee SJ, Park SJ, Kim DY,. Single dose of multi-clade virus-like particle vaccine protects chickens against clade 2.3.2.1 and clade 2.3.4.4 highly pathogenic avian influenza viruses. Sci Rep. 2021 Jul 2;11(1):13786
Virus-like particles (VLPs) are recognized as an alternative vaccine platform that provide effective protection against various highly pathogenic avian influenza viruses (HPAIVs). Here, we developed multi-clade VLPs expressing two HAs (a chimera of clade 2.3.2.1c and clade 2.3.4.4c HA) within a single vector. We then compared its protective efficacy with that of a monovalent VLP and evaluated its potency against each homologous strain. Chickens vaccinated with the multi-clade VLP shed less virus and were better protected against challenge than birds receiving monovalent vaccines. Single vaccination with a multi-clade VLP resulted in 100% survival, with no clinical symptoms and high levels of pre-challenge protective immunity (7.6-8.5 log2). Moreover, the multi-clade VLP showed high productivity (128-256 HAU) both in the laboratory and on a large scale, making it cheaper than whole inactivated vaccines produced in eggs. However, the PD50 (protective dose 50%) of the multi-clade VLP against clades 2.3.2.1c and 2.3.4.4c was < 50 PD50 (28 and 42 PD50, respectively), and effective antibody response was maintained for 2-3 months. This multi-clade VLP protects against both clades of HPAI viruses and can be produced in high amounts at low cost. Thus, the vaccine has potential as a pandemic preparedness vaccine.
See Also:
Latest articles in those days:
- [preprint]Mass mortality at penguin mega-colonies due to avian cholera confounds H5N1 HPAIV surveillance in Antarctica 14 hours ago
- [preprint]How the 1918-1920 Influenza Pandemic Spread Across Switzerland - Spatial Patterns and Determinants of Incidence and Mortality 15 hours ago
- Influenza C Virus in Children With Acute Bronchiolitis and Febrile Seizures 19 hours ago
- Feasibility and Safety of Aerosolized Influenza Virus Challenge in Humans Using Two Modern Delivery Systems 19 hours ago
- Avian Influenza Weekly Update # 1026: 12 December 2025 2 days ago
[Go Top] [Close Window]


