News tagged with immune

Related topics: immune system

Study finds new potential melanoma drug target

A new treatment for melanoma could be on the horizon, thanks to a finding by a UNC Lineberger Comprehensive Cancer Center-led team. In the study, which was published online today in the journal Clinical Ca ...

May 02, 2015
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Scientists 'un-can' the HIV virus

If the human immunodeficiency virus (HIV) is a bit like a hermetically sealed tin can no one has yet been able to break open, the good news is that researchers at the CHUM Research Centre, affiliated with ...

May 04, 2015
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Inflammation stops the biological clock

Researchers at Trinity College Dublin and the University of Pennsylvania have uncovered an important link between our body clock and the immune system that will have relevance to the treatment of inflammatory ...

May 18, 2015
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Infant antibiotic use linked to adult diseases

A new study led by researchers at the University of Minnesota has found a three-way link among antibiotic use in infants, changes in the gut bacteria, and disease later in life. The imbalances in gut microbes, called dysbiosis, ...

May 13, 2015
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Immunity (medical)

Immunity is a biological term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion. Immunity involves both specific and non-specific components. The non-specific components act either as barriers or as eliminators of wide range of pathogens irrespective of antigenic specificity. Other components of the immune system adapt themselves to each new disease encountered and are able to generate pathogen-specific immunity.

Adaptive immunity is often sub-divided into two major types depending on how the immunity was introduced. Naturally acquired immunity occurs through contact with a disease causing agent, when the contact was not deliberate, whereas artificially acquired immunity develops only through deliberate actions such as vaccination. Both naturally and artificially acquired immunity can be further subdivided depending on whether immunity is induced in the host or passively transferred from a immune host. Passive immunity is acquired through transfer of antibodies or activated T-cells from an immune host, and is short lived, usually lasts only a few months, whereas active immunity is induced in the host itself by antigen, and lasts much longer, sometimes life-long. The diagram below summarizes these divisions of immunity.

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