up to date information - Vaccines

What is a Vaccine?

A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. Vaccines typically contain agents that resemble a disease-causing microorganism, often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.

How Do Vaccines Work?

Vaccines stimulate the immune system to recognize the agent as a threat, destroy it, and "remember" it, so that the immune system can more easily recognize and destroy any of these microorganisms that it later encounters. This process is termed immunization.

What Are the Types of Vaccines?

There are several types of vaccines, including:

Live-attenuated vaccines: These vaccines use a weakened form of the germ that causes a disease.
Inactivated vaccines: These contain the killed version of the germ.
Subunit, recombinant, polysaccharide, and conjugate vaccines: These use specific pieces of the germ.
Toxoid vaccines: These contain a toxin produced by the germ.
Messenger RNA (mRNA) vaccines: These provide instructions for our cells to make a harmless piece of the virus.

Are Vaccines Safe?

Vaccines are thoroughly tested before they are approved for use. The safety and effectiveness of vaccines are continually monitored even after approval. Most side effects from vaccines are mild and temporary, such as a sore arm or slight fever.

What is Herd Immunity?

Herd

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