Which of the following can be used to provide immunity to a person who is at risk of developing tetanus?

  • A
    Preformed antibodies
  • B
    More effective antibiotics
  • C
    Attenuated pathogens
  • D
    Killed pathogens

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Match the columns:
Column-$I$ Column-$II$
$(a)$ Main lymphoid organ $(1)$ Thymus
$(b)$ $MALT$ $(2)$ Spleen
$(c)$ Lobe-like organ arranged near heart $(3)$ Bone marrow
$(d)$ Large bean-shaped organ $(4)$ It constitutes $50\%$ of lymphoid tissue

Interferons are the protein molecules produced from the

In the given figure,the part labeled as '$a$' represents:

Which of the following are included as cellular barriers in innate immunity?

Interferons protect non-infected cells from further viral infection. These are included in which of the following barriers of innate immunity?

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