Bird flu, also known as avian influenza, is a highly contagious viral infection that affects birds, especially poultry. The disease is caused by various subtypes of the influenza virus, which can cause respiratory illness and, in some cases, death in birds. Synonyms for bird flu include avian flu, avian influenza, bird influenza, and bird virus. These terms are often used interchangeably in media reports and scientific research to describe the same infectious disease. While bird flu primarily affects birds, it can also be transmitted to humans, posing a significant risk to public health and the global economy. Prevention measures include avoiding contact with infected birds and practicing good hygiene habits, such as washing hands regularly and cooking poultry thoroughly.