Answer:
Avian influenza is an infectious disease of birds caused by type A strains of the influenza virus. In birds, the infection can manifest itself in various ways, from mild symptoms, which can go unnoticed, to a disease that quickly leads to death and can cause a serious epidemic.
Explanation:
A virus is a tiny infectious particle that can only reproduce when it infects a host cell. Viruses "take over" the cell and use its resources to make more viruses, basically by reprogramming it to make it a virus factory. Because they cannot reproduce on their own (without a host), viruses are not considered alive. Viruses also have no cells: they are very small, much smaller than the cells of living things; They are basically just packages of nucleic acid and proteins.
For the spread of bird flu to be transferred from human to human, the virus should mutate into a form that is more easily transmitted from person to person.
Because in 1918 the worst flu virus pandemic was recorded in history.
Viruses such as avian influenza are prone to generate pandemics, due to their rapid spread and the ability to mutate the virus.
