Final answer:
When a person gets vaccinated, their body's immune system produces a response to fight against the specific disease or virus. Mild side effects like low-grade fever and rash may occur, which are temporary and indicate the body's immune response.
Step-by-step explanation:
When a person gets vaccinated, their body's immune system is stimulated to produce a response to fight against the specific disease or virus. The immune response includes the production of antibodies, which are proteins that help the body recognize and destroy the disease-causing microorganisms. In the case of the measles vaccine, the body's immune response helps protect against the measles virus.
However, it is important to note that sometimes after getting vaccinated, a person may experience mild side effects such as low-grade fever and a rash. These side effects are usually temporary and are a sign that the body's immune system is responding to the vaccine and building immunity.