<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["en", "en"].<end_of_turn>
<start_of_turn>user
How do vaccines work to protect against diseases?<end_of_turn>
<start_of_turn>model
Vaccines work by mimicking disease agents and stimulating the immune system to build a defense against them. A vaccine introduces a harmless part of the disease-causing microorganism or a modified version of its toxins into the body. This component is known as an antigen. The immune system recognizes this antigen as a foreign invader and mounts an immune response. This includes the production of antibodies, which are proteins that recognize and can neutralize the pathogen. The immune system also develops a memory of the pathogen, so if the body is exposed to the actual disease in the future, the immune system can quickly recognize and fight it off. This process is known as immunological memory, and it can prevent the onset of disease or reduce its severity. Vaccines have been successful in controlling, and in some cases eradicating, many infectious diseases.<end_of_turn><eos>