1. A method for the prevention or treatment of viral infections in patients, comprising administering to the patient a composition containing purified RNA extract in combination with mannitol in an amount sufficient to prevent and treat infection. A method according to claim 1, characterized in that the composition contains purified yeast RNA in an amount sufficient to inhibit the multiplication of the virus. The method according to claim 1, characterized in that it includes the introduction of such an amount of a composition that effectively suppresses virus receptors that ensure the replication of viruses in cells. The method according to claim 1, characterized in that it is a method for the prevention or treatment of infection caused by a virus from the family of Orthomyxoviridae. 5. The method according to claim 4, characterized in that the infection is an anthroponous acute respiratory infection. A method according to claim 1, characterized in that it is a method for the prevention or treatment of infection caused by a virus from the paramyxovirus family. A method according to claim 1, characterized in that it is a method for the prevention or treatment of infections caused by hepatitis viruses. The method of claim 7, wherein the virus is hepatitis C.9 virus. The method according to claim 1, characterized in that it is a method of preventing or treating an infection caused by viruses from the herpes virus family. The method of claim 9, wherein the virus is a herpes simplex virus. The method of claim 9, wherein the virus is genital herpes virus. A method according to claim 1, characterized in that it is a method of preventing or treating an influenza virus infection. The method according to p. 12, characterized in that the influenza virus is a strain H1N1.14. The method according to p. 12, characterized in that1. Способ профилактики или лечения вирусных инфекций у пациентов, включающий введение пациенту композиции, содержащей очищенный экстракт РНК в сочетании с
