An<unk>  (or a live<unk> , LAV) is a vaccine created by reducing the virulence of a pathogen, but still keeping it viable (or "live"). Attenuation takes an infectious agent and alters it so that it becomes harmless or less virulent. These vaccines contrast to those produced by "killing" the virus (inactivated vaccine).<unk> s stimulate a strong and effective immune response that is long-lasting. In comparison to inactivated vaccines,<unk> s produce a stronger and more durable immune response with a quick immunity onset.<unk> s function by encouraging the body to create antibodies and memory immune cells in response to the specific pathogen which the vaccine protects against. Common examples of live<unk> s are measles, mumps, rubella, yellow fever, and some influenza vaccines.
Attenuated vaccine
Conjugate vaccine
Heterologous vaccine
Inactivated vaccine
Synthetic vaccine
Subunit vaccine
Plant expressed vaccine
Genetically modified vaccine