Cough, fever, and cold, this is how the symptoms of corona appear, but some people with the virus don't feel anything at first, although it bears in their bodies, and the strength of the immune system remains the protective shield for humans. Severe corona infection may end in death or recovery! The following are four stages or phases that a person who has the disease must go through, according to the German magazine "Der Spiegel" and the "Duchi Villa" site:
Virus transmission
The most important methods of infection are mucus drops, saliva and even eye tears scattered from the person, as they are an essential carrier of the virus, thousands of which are scattered in the air in any area through which the person passes, transferred to the unlucky person in the event of contact with any surface on it from any of the previous effects.
Once the viruses attach to a person, the cells of the body absorb them, and the viruses benefit from the mechanisms of cells to deliver their harmful substances inside the cells. Once the virus passes this stage, it starts to align the cell mechanism to produce new viruses. Then the cell begins to produce hundreds of infinitesimal copies of the virus, and the cell dies due to pressure on it, so the viruses are released, looking for new cells to penetrate them in the mind of the immune system that protects the body, and thus begins the second stage of the disease.
The onset of the disease
Invasive viruses are launched in their search for new cells, which leads to alert the immune system to the imminent danger, and begins to move its defenses, for the patient begins feeling that an abnormal thing is in his body, his temperature rises, and he starts coughing in an attempt by the respiratory system to flush the viruses out of the body.
Some people never feel the activity of their immune system against the virus, and this is because they do not show any of the symptoms of resistance, such as fever, coughing, nasal and oral leakage and tearfulness from the eye.
Decision stage
The days after the onset of the disease are viruses that flow through the body, and if the immune system activates enough to restrain it, it will limit the spread of the virus, and the body remains at this stage and does not go beyond it to the fourth stage, and here the patient feels some relief, and begins to pass the recovery phase, The majority of patients in this phase recover in their homes outside of hospitals. So far, 80% of injuries have been cured in this phase, but this assessment and proportion are from China. In Germany, about 14% of all patients are hospitalized. In this phase, there is a possibility that the infection will pass to the "severe injury" stage. In this case, the occurrence of "Covid 19" disease may end in the death of the injured 18 days after his injury.

Healing
It takes one to two weeks for the body to recover, according to reports from China, for the body to recover, and if the injury is severe, the recovery phase may extend from 3 to 6 weeks. If the immune system completes its work, it leaves antibiotics in the cells as a witness to infection, and if the new Corona virus attempts to penetrate the cells again, it will immediately begin to diagnose the danger, and start protecting the cells for a specific stage to prevent new attacks from this virus.