By this time you can be very ill with a disease. Subsequent invasions take only 2-3 days to mount a response and the response is of a greater magnitude and duration that the response to the antigen upon first encounter. For many diseases we acquire a permanent immunity after we get that disease. For some we never gain immunity. Active and Passive Immunity Passive Immunity confers some immunity when antibodies form someone else are introduced into a person needing immunity.
Babies get antibodies from their mothers while in the womb.
Babies who breast feed get antibodies form colostrum and breast milk. Passive Immunity provides some protection against the disease. This protection is temporary. Some people react badly to the injection of foreign proteins. Information contained on this page does not represent the lecture verbatim.