What is the meaning of the word "vaccine"?

Vaccines are a critical tool in public health, providing effective protection against many infectious diseases and contributing to the control and eradication of some of the world's most dangerous pathogens.

Definitions:

A biological preparation that provides active acquired immunity to a particular infectious disease. NOUN
- The new vaccine promises to provide immunity against the deadly virus.
A preparation that contains an agent that resembles a disease-causing microorganism. NOUN
- The development and distribution of vaccines have played a crucial role in combating infectious diseases throughout history.
A substance given to stimulate the body's production of antibodies and provide immunity against a disease, prepared from the agent that causes the disease or a synthetic substitute. NOUN
- Vaccines are considered one of the greatest public health achievements of the 20th century.
Any preparation used to render an organism immune to some diseases, by inducing or increasing the natural immunity mechanism. NOUN
- The vaccine has been showed to reduce the severity of symptoms and hospitalization rates.
Immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies. NOUN
- Travelers to certain regions may need to receive vaccines for diseases such as yellow fever and typhoid.