One of the biggest issues with vaccines in general, is that the antibodies to some things just don’t stay in the body for very long. Some vaccines will work the rest of your life. Some will be gone in months.
The fact that viruses also mutate constantly, also make it necessary to create new vaccines constantly. That is why there is a new flu shot every year.
rhn18 t1_j3qixju wrote
Reply to Does the immune system have a limit on memory for vaccines? Can we vaccinate against any and all microorganisms if we wanted to? by AdiSoldier245
One of the biggest issues with vaccines in general, is that the antibodies to some things just don’t stay in the body for very long. Some vaccines will work the rest of your life. Some will be gone in months.
The fact that viruses also mutate constantly, also make it necessary to create new vaccines constantly. That is why there is a new flu shot every year.