We all know it but, What is immunity?

Updated: Apr 26

Immunity can be defined as a complex biological system endowed with the capacity to recognize and tolerate whatever belongs to the self, and to recognize and reject what is foreign (non-self).

From: Encyclopedia of Biomedical Engineering, 2019


Immunity is an extensive topic, worthy of an encyclopedia of its own. Here we cannot summarize the field in detail, but will identify key concepts. Body n Health discusses two component of immunity that is innate and adaptive.


Innate Immunity

This provides the first line of defense against infection. It is a rapid response (minutes); it is not specific to a particular pathogen. It has no memory and does not confer long-lasting immunity to a body. For example, when communicable and non-communicable diseases along with seasonal change brings cold, cough, mucus formation, indigestion, fever and other health problems, human immune system responds to stop such problems from spreading.


Innate immunity can be made stronger with the help of therapeutic diet suggested by dietitian Smita Karan, best dietitian in Delhi NCR. You can Boost Immunity with these 10 food items for yearlong immunity.


Adaptive Immunity

This provides a specific immune response directed at an invading pathogen. Following exposure to a foreign organism there is an initial effector response that eliminates or neutralizes a pathogen. Later re-exposure to the same foreign organism induces a memory response with a more rapid immune reaction that eliminates the pathogen and prevents disease.


For example, the pathogen identified as a novel coronavirus (COVID-19) affects different people in different ways. Most infected people will develop mild to moderate illness and recover without hospitalization but for some it becomes life threatening.


Covid-19 vaccines have been tested by multiple drug administration authorities in the world. They are proven to be effective in reducing probability of contracting COVID-19. Once a person is vaccinated, body is much better prepared to shield off more viruses by making immune system stronger.


Apart from various vaccines available to shield against Covid-19 virus, you can take therapeutic diet for corona patient by Dietitian Smita Karan


This blog is for informational purposes only. Consult your local medical authority for advice.


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