Introduction
An active antigen is an allergen that is capable of causing a hypersensitivity reaction that occurs only upon repeated or repeated administration. With repeated administration of the drug, the likelihood that the body will show increased sensitivity to it is higher than with the initial use. If upon first administration it causes only a hyperergic reaction, then with subsequent administrations a more severe one may develop - up to anaphylactic. Moreover, in previously sensitized individuals, the clinical picture will in most cases be more pronounced. There are several gradations of hypersensitivity reactions after taking medications:
- individual (rarely develops), the condition does not get worse; - moderate (causes slight deterioration); - severe (the disease manifests itself acutely, becomes stronger, lasts longer, is permanent); - severe (does not occur immediately), shock syndrome manifests itself a long time after the previous dose or even several hours later; - very severe (requires resuscitation measures).
Such a reaction can be provoked by medications, food, medical materials, vaccines, etc. In addition, there is a respiratory route of transmission of immunoglobulin - if it enters