How a tiny dose of virus trains your body to fight back
In short: Discover why injecting a weakened pathogen is the key to long-term immunity. This video explains the biological mechanics that allow our bodies to recognize and defeat deadly diseases before they can cause harm.
The process begins with the introduction of a small amount of a virus, such as cowpox, into the body. This triggers an immune response that teaches the system to identify specific dangerous pathogens without making the person sick.
This method dates back to Edward Jenner, who first used cowpox to provide protection against the much more lethal smallpox virus. By mimicking a real infection in a controlled way, vaccines prepare the body's defenses for future encounters with actual diseases.
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Sources
- Summary by Intellect · source: How do vaccines work? - Kelwalin Dhanasarnsombut
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