What are the main ingredients that make up a vaccine

The main ingredients that make up different vaccines are different.

Vaccines are automatic immune preparations for the prevention of infectious diseases made from pathogenic microorganisms (e.g., bacteria, rickettsiae, viruses, etc.) and their metabolites, which have been artificially attenuated, inactivated, or genetically modified.

Vaccines retain the property of pathogenic bacteria to stimulate the immune system of the animal body. When the animal is exposed to the non-injurious pathogen, the immune system produces certain protective substances, such as immune hormones, active physiological substances, special antibodies, etc.; when the animal is exposed to the pathogen again, the animal's immune system will follow its original memories to produce more protective substances to prevent the pathogen from harming it.

History of Vaccine Development

The discovery of vaccine can be regarded as a landmark event in the history of human development, because in a sense, the history of human flourishing is the history of human beings' continuous struggle with diseases and natural disasters, and the most important means of controlling infectious diseases is prevention, which is regarded as the most effective measure by vaccination.

And the fact proved to be so, threatened the human hundreds of years of smallpox virus in the cowpox vaccine appeared after the complete elimination, ushered in the human vaccine to meet the virus of the first victory, but also more firmly believe that the vaccine on the control and elimination of infectious diseases. Since then, the vaccine family has expanded over the past 200 years.

Production times vary from vaccine to vaccine, with some vaccines taking up to 22 months to produce a single batch. Vaccine development is a long, complex, and costly process. Vaccination is the most cost-effective and efficient public **** health intervention to prevent and control infectious diseases, and for families it is also an effective means of reducing the incidence of disease in their members and reducing health care costs.

It is estimated that immunization averts 2 to 3 million deaths per year from diphtheria, tetanus, pertussis and measles. Global vaccination coverage (the percentage of children worldwide who receive recommended vaccines) has remained stable over the past several years.

Baidu Encyclopedia-Vaccines