How do vaccines work?

• A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease.
• The safety and effectiveness of vaccines has been widely studied and verified.
• A 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.

Where this comes from

• Vaccine — en.wikipedia.org Preparation for acquired immunity to disease

Read the full picture

• Vaccine — the article, section by section
• Ask this in movaindia — the answer with its key points and the sources behind each one

Related questions

• What is the immune system?
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How this page was built

The question was read for its subject and its type. The subject was searched on en.wikipedia.org, the matching article was selected, and the sentences that answer the question were taken from it. Nothing was rewritten and nothing was invented; where the source does not answer, this page says so rather than filling the gap. The full method is here.