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vagabundo [1.1K]
3 years ago
8

Certain preparations contain killed or weakened live biological agents that, upon injection into our body, protect the body agai

nst those pathogens. What are these preparations called?
Biology
2 answers:
Galina-37 [17]3 years ago
6 0
They are called vaccines
Lubov Fominskaja [6]3 years ago
5 0
These preparations are called Vaccines. A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing micro-organism and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins.
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