The flu virus is able to infect our cells by attaching to receptors on the surface of the cells. These receptors are called sialic acids. Once the virus has attached to the cell, it enters the cell by fusing with the cell membrane.
Once inside the cell, the virus begins to replicate. It makes copies of its genetic material, called RNA, and it uses the cell's machinery to make new copies of the virus.
The new copies of the virus are then released from the cell by budding from the cell membrane. This process can damage the cell and cause it to die.
The flu virus can also spread from person to person through respiratory droplets. When someone who is infected with the flu coughs, sneezes, or talks, they can release respiratory droplets into the air. These droplets can contain the flu virus, which can then be inhaled by other people.
The flu virus can also spread through contact with contaminated surfaces. If someone who is infected with the flu touches a surface, the virus can be transferred to that surface. Other people can then become infected with the flu if they touch the contaminated surface and then touch their eyes, nose, or mouth.
There are several things that people can do to help prevent the spread of the flu virus, including:
* Getting vaccinated against the flu
* Washing your hands frequently with soap and water
* Avoiding touching your eyes, nose, and mouth
* Staying home from work or school if you are sick
* Covering your mouth and nose when you cough or sneeze
* Disinfecting surfaces that may be contaminated with the flu virus
