attenuated vaccine

An attenuated vaccine contains a live but weakened form of a virus or bacteria. This weakened version stimulates your immune system to recognize and fight the pathogen without causing illness in healthy individuals. Because it closely resembles a natural infection, it often produces a strong and long-lasting immune response. These vaccines are used for diseases like measles, mumps, and chickenpox. However, because they contain live organisms, they are usually not recommended for people with weakened immune systems. Overall, attenuated vaccines are an effective way to build immunity while minimizing the risk of disease.