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Reliable means against certain viral diseases are vaccinated. Thanks to vaccines humanity freed from smallpox, polio, makes many children crippled. But, say, against the influenza virus is very changeable, diverse, reliable, has no vaccine.
For a long time in the treatment of influenza and other viral infections against which no vaccine, doctors could rely only on the resistance of the organism, its immune system. The patient was administered only bracing and medicines that protect against influenza after complications.
In 1957, British scientists A. Isaacs and J. Lindemann, studying the cells of chickens infected with the virus, discovered a substance that is then called interferon (from the Latin "inter" - "one", "together" and "Furno" - "hit "" smite "). This is a protein produced in cells during the invasion of the virus in the body. It strengthens the struggle waged by antibodies to the virus, preventing the spread of rampant insidious pathogen, seeking to capture the largest possible number of cells. Interferon inhibits the formation of nucleic acid of the virus, making it easier for the disease, speeding recovery. Antibodies also struggling with a virus inside the cell, interferon - like outer guard, he does not give the virus to penetrate into the fraudulently
the cell. And one more feature. In contrast, antibodies against interferon does not act one of a virus, but against many. Against many but not all. Not so simple viruses to protect yourself from them by using one of any means.
Interferon is produced by the body. It is formed before the appearance of antibodies within a few hours after the invasion of the virus, taking the first attacks the pathogen disease.
So, the way the virus grows two protective barrier - interferon and antibodies. But by no means uncommon for the combined efforts of the two bodies is protective is not enough. And the doctors, by adopting interferon, began to apply it to medical practice. But where can I get it? It's all turned out to be more difficult than with insulin, which can be extracted from the pancreas of animals. The only natural source of interferon - human blood, and her white blood cells are infected by a virus and they begin to produce interferon, which is administered to the patient after treatment. However, cells produce a negligible amount of interferon. To get a therapeutic dose of the drug, it is necessary to have 2 liters of blood. Experts figured: the annual requirement of interferon are not satisfied, even if all the inhabitants of the planet will be the donor! Not surprisingly, the cost of one course of treatment with interferon is very expensive. Interferon was the only remedy for the richest.