How flu infects us?

flu infects usFlu is a contagious viral infection that attacks the nose, throat and lungs. The complaints, which can cause are fever, chills, runny nose, sore throat, cough, muscle aches and fatigue. Influenza is extremely small and visible only with a microscope. Inside is the genetic material that contains the information needed to create more copies of the virus. The hard coat protein provides protection for genetic material when the virus falls on people and animals infected. Its outermost layer allows it to infect cells, such as merging with the outer membrane of the cell. From the containment of the virus spikes protrude from protein molecules. Flu virus using H-spikes as key to enter the cell. N-spikes allow copies of the virus to break away from already infected cells to infect others. There are 17 known H-studs 9 and N-type spikes that researchers used to give a designation of various influenza viruses.
 
We can get infected when you touch the subject on which a virus or by exposure to bodily fluids of people who are already infected. When someone infected speak, cough or sneeze, droplets contained the influenza virus can fall on our nose or mouth, then in the lung. Once in the body, influenza virus comes into contact with cells in the nose, throat or lungs. H-spikes of the virus is inserted into the molecule-receptor which is located on the membrane of healthy cells. This enables the virus to penetrate into the cell.
 
Then, the virus travels in a bag made from the cell membrane to the cell nucleus. The viral envelope and the cell membrane fuse, allowing viral genetic material from getting into the core of the still healthy cells.