Artificial active immunity can be acquired from

  • A
    Serious illness
  • B
    Vaccination
  • C
    Repeated exposure to some microbes
  • D
    Treatment with penicillin

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Similar Questions

Assertion $A$: Vaccination protects an individual against infection by specific pathogens.
Reason $R$: $B$ and $T$ memory cells produce antibodies in large quantities to neutralize the pathogen attack.
Which option is correct for Assertion $A$ and Reason $R$?

Define the following terms:
$(a)$ Immunity
$(b)$ Retrovirus
$(c)$ Allergy

The cells which suppress the entire immune system from its attack in the same body are known as

What is produced by sensitized helper $T$-cells?

Perforin is secreted by which of the following cells to prevent the effect of microbes?

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