#vaccine component

• Toxoid — A bacterial toxin modified through thermal and chemical treatment, usually with formaldehyde, which completely loses its pathogenic toxic power while retaining its structural antigenic properties intact. This biological substance is widely used in vaccine preparation to stimulate the body to produce specific antibodies and ensure long-lasting active immunity against severe diseases such as tetanus or diphtheria.
• Avirulent — Regarding microorganisms (bacteria, viruses): devoid of virulence or pathogenicity; lacking the structural capacity to trigger an infectious disease in the host organism. In a technical sense, it describes microbial strains artificially attenuated in the laboratory or natural mutants, frequently used as active agents in the production of live attenuated vaccines.
• Anavirus — A virus structurally modified through physical or chemical methods that completely loses its replication capacity and virulent pathogenicity, while preserving its original antigenic structure intact. This attenuated biological preparation is used in immunology to stimulate the production of protective antibodies within modern vaccines.