During this time comprehensive researches have been conducted which showed that all cells of a body must produce interferon. IF is not an interstitial product of metabolism but its production by cells is genetically determined. It means that there are parts coding synthesis of IF in the general genome of a cell. And there are many genes in the human genome. Production of a big amount of various IF by a cell is biologically expedient.
Interferons are an essential factor of vital activity of a cell itself.
Due to their influence changes hindering reproduction of viruses occur on the surface and inside a cell. This is the first very important feature of interferon anti-viral universal action. Whereas it is a very big problem as antibiotics are not effective in struggle against viral infections. At the same time it is impossible to create medical serums against all viruses. That is why medicaments with interferon are the most widely used against viral infections.