Difference between Active Immunity and Passive Immunity – Comparison Table


Compare active and passive immunity

Active Immunity vs Passive Immunity
(Similarities and Differences between Active and Passive Immunity)

The acquired immunity is the immunity acquired by an organism during its life. The acquired immunity against a particular microbe may be induced by the host’s response to the microbe or by the transfer of antibodies or lymphocytes specific for the microbes. Based on the above criteria, the acquired immunity is categorized into two types – (1) Active Immunity and (2) Passive Immunity.

Active Immunity:

The active immunity is the direct response of your body against the pathogens. It is induced by the exposure to a foreign antigen such as the antigen of microbes. It is an adaptive response of the individual after contact with specific pathogen or antigen.

what is active immunity

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Difference between Cell-mediated and Humoral Immunity (Comparison Table)


Compare Cell-mediated & humoral

Cell-mediated vs Humoral Immunity
(Similarities and Differences between Cell-Mediated and Humoral Immunity)

The immunity induced in an organism by the exposure of a foreign antigen is called Active Immunity. The active immunity is mediated through two distinct mechanisms, and they are named as (1) Cell-mediated immunity and (2) Humoral immunity. These two immune pathways show considerable differences in their components, their targets, and the method of killing of pathogens.

Cell-mediated immunity:

The cell-mediated immunity is facilitated by the activated TH cells (T-Helper cells) and Cytotoxic T Lymphocytes (CTLs). Cytokines secreted by the TH cells activate the phagocytic cells. These activated phagocytic cells then phagocytosis and kill the microbes. The cell-mediated immunity is particularly important against the bacterial and protozoan pathogens.

Humoral Immunity (antibody-mediated immunity):

The Humoral immunity is mediated through antibodies. Antibodies are produced by the B cells. These antibodies bound to specific microbial antigens. Binding of antibodies to antigens neutralize the microbes and target them for elimination by various effector mechanisms. The humoral immunity is the major defense mechanism against the extracellular microbes trying to invade the host systems.

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