Related Experiment Videos
Influenza pandemics: past, present and future
Yu-Chia Hsieh1, Tsung-Zu Wu, Ding-Ping Liu
1Section of Infection, Department of Medicine, Wan-Fang Hospital, Taipei Medical University, Taipei, Taiwan, R.O.C.
Journal of the Formosan Medical Association = Taiwan Yi Zhi
|January 28, 2006
Summary
Influenza A virus genetic shifts can cause pandemics. Understanding host immune responses to novel strains like H5N1 is crucial for developing future pandemic therapies.
Area of Science:
- Virology
- Immunology
- Epidemiology
Background:
- Influenza A virus undergoes genetic changes (antigenic drift and shift), with shift potentially causing pandemics.
- Historical pandemics (1918, 1957, 1968) show patterns of spread and varying mortality.
- Avian influenza A H5N1 virus infections share pathological similarities with severe historical influenza strains.
Purpose of the Study:
- To analyze historical influenza pandemic patterns.
- To investigate the role of host immune response in severe influenza.
- To highlight the potential for an impending influenza pandemic.
Main Methods:
- Historical pandemic data review.
- Comparative analysis of clinical and pathological findings from different influenza strains.
- Examination of host immune responses, including lymphocyte and macrophage activation.
Main Results:
- Antigenic shift can lead to novel viruses and global pandemics.
- The 1918 pandemic uniquely affected young adults with severe symptoms and multi-organ involvement.
- Avian H5N1 infections exhibit pathological features similar to severe influenza, including reactive hemophagocytic syndrome.
Conclusions:
- The conditions for a new influenza pandemic are present.
- Host immune response, particularly cytokine storms, is critical in severe influenza.
- Further research on virus-host interactions is vital for pandemic preparedness and therapeutic strategies.