Vaccines introduce a harmless form of a pathogen (or its genetic material) into the body, prompting the immune system to produce antibodies without causing illness. This process trains the immune system to recognize and fight the real pathogen if encountered, reducing the likelihood of severe infection and aiding in disease eradication.
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Vaccines prevent infectious diseases by stimulating the immune system to recognize and remember pathogens. They contain weakened or inactivated forms of viruses or bacteria, or pieces of these pathogens (like proteins), which trigger the immune system to produce antibodies. If the body encounters the actual pathogen in the future, the immune system is prepared to fight it off, preventing illness. This process helps develop immunity without causing the disease itself.
Vaccines prevent infectious diseases by stimulating the immune system to recognize and respond to specific pathogens, such as viruses or bacteria, without causing illness. They contain inactivated or weakened versions of the pathogen, or pieces of it (like proteins), that trigger an immune response. This leads to the production of antibodies, which "remember" the pathogen. If the body is exposed to the actual pathogen later, the immune system can quickly recognize and neutralize it, preventing infection or reducing its severity.