New Delhi, 30 April, 2025: As the world continues to recover from the long-lasting impact of the COVID-19 pandemic, a new global threat has emerged from the United States – the threat of avian influenza, more commonly known as bird flu virus or H5N1 virus. According to the recent reports, the virus has already triggered human infections in several countries, including China and Cambodia, and has reignited fears over its potential to spark another pandemic.
What Is Bird Flu?
Bird flu refers to avian influenza, a viral infection primarily affecting birds. It caused by Influenza Type A viruses, which naturally found in wild aquatic birds but can infect domestic poultry and other animals. Of particular concern are highly pathogenic avian influenza (HPAI) strains. Such as H5N1, H5N6, H7N9, and, more recently H5N1 and H5N8, which have known to infect humans sporadically.
Unlike seasonal flu, avian influenza in birds spreads rapidly and is often fatal, leading to mass culls in poultry farms to prevent further transmission.
How Does Bird Flu Spread to Humans?
Human infection typically occurs through direct or close contact with infected birds, their droppings, or contaminated environments. This includes:
- Handling sick or dead birds
- Visiting live bird markets
- Exposure to feathers, bird fluids, or feces
Bird flu does not usually spread easily from human to human, which is a key difference from COVID-19. However, scientists warn that the virus can mutate. If it acquires the ability to transmit efficiently between humans, it could become a serious global threat.
Could Bird Flu Become the Next Pandemic?
The possibility of a bird flu pandemic is not new. Experts have long feared that if avian influenza viruses mutate to spread efficiently between humans, they could cause a health crisis far deadlier than COVID-19.
Several factors heighten this risk:
- Widespread outbreaks in poultry and wild birds, especially migratory species that can travel across continents
- Spillover into mammals, including farm animals and even sea lions, suggesting the virus is adapting
Reassortment: If someone get infected with both seasonal flu and bird flu, the two viruses could exchange genetic material, creating a new hybrid strain capable of human-to-human transmission
However, at present, no sustained human-to-human transmission has observed with H5N1 or other avian flu strains.
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