The English phrase 'passive immunity' means an impermanent form of acquired immunity in which antibodies against a disease are acquired naturally (as through the placenta to an unborn child) or...
Active immunity is acquired from vaccinations or from infection against a pathogen. The next time you encounter the same pathogen your body has built memory against it and will be able to fight it...
Immunities passed to the infant from the mother while the fetus was forming is called passive immunity. Most of the immunities an adult human has are developed over time. Passive immunity in babies...
