#immunity
#ImmunityClass11
#Activeimmunity
#Passiveimmunity
#immunesystem
#immunityAndItsTypes
Two types of immunity exist - active and passive:
Active immunity occurs when our own immune system is responsible for protecting us from a pathogen.
Passive immunity occurs when we are protected from a pathogen by immunity gained from someone else.
Both of these different types of immunity can be acquired in different ways.
A third category, community immunity, does not involve physical components of the immune system for protection, but is still worth discussion in this capacity.
Active immunity
Individuals rely on active immunity more so than passive immunity. Active immunity is created by our own immune system when we are exposed to a potential disease-causing agent (i.e., pathogen). Most of the time, we are exposed to these potential pathogens naturally throughout the course of our day - in the air we breathe, the food we eat, and the things we touch. Luckily, most of these exposures are to agents that will not result in disease, either because they are harmless or because our immune system works to neutralize them.
Passive immunity, or immunity gained in a way other than from one’s own immune system, can occur in a few ways and can be life-saving. However, passive immunity is short-lived because the antibodies are not continually replenished as they would be in an individual whose immune system is responding directly.
Fsc Biology lectures series by irtisamsbiology chapter 14