"Vaccines are defined as immunogenic preparations of a pathogen that evoke an immune response without causing disease."[1] "Some vaccines offer full sterilizin

"Vaccines are defined as immunogenic preparations of a pathogen that evoke an immune response without causing disease."[1] "Some vaccines offer full sterilizing immunity, in which infection is prevented completely."[2] [1] Vaccinology: Principles and Practice (2012), p.3 https://book4you.org/book/2156866/923113 https://book4you.org/book/2156866/923113 [2] https://en.wikipedia.org/wiki/Vaccine https://en.wikipedia.org/wiki/Vaccine