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What is a vaccine? The immune system “remembers” its reaction to pathogens and is able to replicate this response. Vaccines work by triggering a controlled immune response, so that a person's immune system is able to recognize and destroy pathogens before that person becomes ill.
Likewise, how do vaccines work step by step?
A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response. These molecules are called antigens, and they are present on all viruses and bacteria.
Likewise, how do vaccines work article?
Vaccines are like a training course for the immune system. When foreign invaders such as bacteria or viruses enter the body, immune cells called lymphocytes respond by producing antibodies, which are protein molecules. These antibodies fight the invader known as an antigen and protect against further infection.
When the familiar antigens are detected, B-lymphocytes produce antibodies to attack them. Vaccines prevent diseases that can be dangerous, or even deadly. Vaccines greatly reduce the risk of infection by working with the body's natural defenses to safely develop immunity to disease.