Vaccine
Pathogen-derived preparation that provides acquired immunity to an infectious disease
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A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease. 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. 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. Vaccines can be prophylactic, or therapeutic. Some vaccines offer full sterilizing immunity, in which infection is prevented completely.
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NBA and Covid-19 vaccinations: Anti-vaccine protesters support Kyrie Irving in New YorkAnti-vaccine demonstrators gather outside the Barclays Center to show their support for Brooklyn Nets guard Kyrie Irving before his team's NBA home opener.BBC Sport - Published |
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