Cancer

New cancer strategies promising, says researcher

Dr. Tim Fenton, an expert in cancer research at the University, says the announcement of new strategies to overcome the evolution of drug resistance in tumours could dramatically increase the effectiveness of cancer therapies.

Diseases, Conditions, Syndromes

Team finds biomarkers to diagnose serious kidney allergic reaction

A team led by Johns Hopkins Medicine researchers says it has identified two protein biomarkers in urine that may one day be used to better diagnose acute interstitial nephritis (AIN), an underdiagnosed but treatable kidney ...

Medical research

Mast cells crucial to causing osteoarthritis

Stanford University School of Medicine scientists have definitively linked mast cells, a class of cells belonging to the immune system, to the development of osteoarthritis, one of the world's most common causes of pain and ...

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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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