As infected with chicken pox
Most often, chicken pox sick as a child, since this infection is very contagious and is transmitted by airborne droplets or by contact from a diseased to a healthy one. After the virus that causes chickenpox, fall into the nasal mucosa, it enters the bloodstream and begins to affect the circulating cells.
Propagated virus within two weeks without causing clinical manifestations. After that it goes into the bloodstream and into the skin, resulting in skin rash, which are the main clinical symptom of chickenpox. At hit of a virus in the body, the immune cells begin to produce antibodies, which represent protein structures (immunoglobulins). They are able to destroy harmful microorganisms, including virus varicella.
After recovery, the person usually is no longer suffering from this disease because in his body there is a strong immunity.
Is it possible to get chicken pox a second time
Each pathogen has its own unique antigen. Each type of antibody has an affinity to only one microorganism - antibody is able to recognize the antigens against which they are directed. The affinity of antibodies due to the specificity of the function of immunocompetent cells, which are first "find out" the antigens of microbes and only after that they begin to produce antibodies against these germs.
This affinity is absolutely necessary to prevent destruction of the bacteria of the normal microflora and cells of the body.
Thus, when people become infected with the chickenpox virus, his body begins to produce special antibodies aimed specifically against this type of microbes. The result affects the virus and they infected cells. Further, the portion of the antibody is destroyed, and the remaining slightly change and form the so-called memory cells, which then pass into a dormant state and provide life-long immunity to chickenpox.
When re-infected with chicken pox these cells quickly destroy the virus, and the disease does not develop. Normal memory cells to chickenpox remains in the body for life. In some cases, if an incorrect functioning of the immune system they are destroyed after a few years, in this case, the person may re-ache chicken pox. In some cases after the disease the virus can not be destroyed, as it "falls asleep" and remains viable. In patients with severe immunodeficiency, patients after organ transplantation, when the immunosuppression caused by severe stress during the acclimatization may re-infected with chicken pox.