active immunization

https://doi.org/10.1351/goldbook.12835
Immunization with antigen, as distinct from the transfer of antibody to an unimmunized individual, which is called passive immunization.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1116 [Terms] [Paper]