Recover from a disease
Natural Active
Vaccine (contains antigen)
▪️ live attenuated
▪️ inactivated
▪️ toxoid (modified)
Artificial Active
▪️ Passed during 3rd trimester of pregnancy
▪️ transplacental
▪️ breastfeeding
Natural Passive
▪️ Antibodies injection
▪️ antiserum / antitoxin (from animals)
Artifical Passive