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Natural active = you make it from infection
Recovering from a real infection-->body produces own antibodies
Ex. Measles, chickenpox
Natural passive = you receive it from mom
Preformed antibodies transferred from mother (no antigen Stimulus)
Ex. Maternal IgG across placenta; IgA in breastmilk
Artificial Active = you make it from vaccine
Vaccination--> antigenic stimu triggers body to produce own antibodies + memory cells
Ex. MMR, DTaP, flu shot, Covid mRNA vaccine
Artificial Passive = you receive it
Preformed antibodies injected--> immediate but temp protection (no antigen, no memory)
IVIG, specific immune globuling, animal antisera (antivenom)