Live attenuated virus vaccine

A live attenuated virus vaccine contains a weakened form of the virus that causes a disease. Because the virus is attenuated, it cannot cause illness in healthy individuals but still stimulates the immune system to recognize and fight the real virus in the future. These vaccines typically produce strong and long-lasting immunity with just one or two doses. Examples include vaccines for measles, mumps, and rubella. They are generally safe for healthy people but may not be suitable for those with weakened immune systems. Overall, they provide effective protection by closely mimicking natural infection without causing serious disease.