3 Times the Charme
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious diseaseA vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins. The agent stimulates the body's immune system to recognize the agent as a threat, destroy it, and to further recognize and destroy any of the microorganisms associated with that agent that it may encounter in the future.
In our medical November we are looking at a special vaccine today - one that provides immunization against not one, but three serious diseases: diphtheria, tetanus and pertussis (whooping cough). This special vaccine was first licensed in 1949 and has since been part of the "standard" immunization program ever since.
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