Introduction
Whereas previous Forum discussion topics have been freestanding, the one presented here is a follow up conversation to one of GTN’s WOW online events which explored the topic of immunity.
A Summary of the Topic:
We live in an environment in which there are many micro-organisms and other substances such as pollutants which potentially can harm us. Our bodies have a multi-layered defence system that protects us from these threats. This immune system can be divided into two sub-systems, one which is ‘innate’ (inborn) and can protect us from threats from day 1 of our lives. The other is acquired over time (‘adaptive’ is the scientific term). It is not fully functioning right away but amazingly adapts to threats that the body is exposed to. This second system has a memory function which means we can respond rapidly if the same threat (virus, bacteria) appears in the future.
In his presentation, Professor Chris Packard highlighted our ‘outer’ defences which include skin (which keeps bacteria on the outside, tears (which destroy bacteria and flush the eye surface) and mucus which protects internal tissues exposed to the environment (such as lungs and gut). He also referred to ‘first responders’ in the fight against harmful bacterial enemies, drawing attention to the role of cells called macrophages which travel the body and ‘eat bugs and foreign substances’ WOW!
Professor Packard went on to highlight how the body responds to threats such as allergens in the air and in food. We mount a defence against these as part of our inborn system attempting to reduce any harm they could do, and to expel them from the body. Other forms of attack are when we have a penetrating injury such as standing on a nail. A cascade of local biological responses take place that we term ‘inflammation’. Inflammation is characterised by redness and swelling at the site of injury and this reaction helps reduce damage and initiates wound repair. He noted, however, that ‘inflammation’ has a downside especially in older people. If our joints or other tissues become damaged internally, then inflammation occurs again at the site of ‘injury’. This site could be a knee joint that has lost protective cartilage or part of your lung lining. Then inflammation if it develops can be a cause of ongoing discomfort and even pain.
Returning to the subject of ‘bugs’, he asked the leading question: Are all bugs bad?
To answer the question, he turned to microbiologist Dr Rose Mary Harley who responded by describing the microbiome, ‘the community of benign micro-organisms that are found living in any habitable space in our bodies (intestines, lungs, mouth etc). Dr Harley provided much practical advice on how to foster these good bacteria and keep bad ones at bay.
In the second part of his presentation, Professor Packard explained how in the period from birth to one month old, our acquired immune system is trained to distinguish between ‘self’ and ‘invaders’. It is a simply astonishing system that protects us throughout life.
Finally, there was an explanation of how vaccines work and how what we can harness the immune system to protect us against specific types of infection. Medical science continually investigates how intervention – in for example the destruction of tumours – can promote health and life even further.
For Q&A, GP Dr Pamela Ross joined the other presenters.
The third part of the session was presented by Moira Robertson under the heading ‘Spiritual Immunity’
Spiritual Immunity
Moira Robertson presented the ABC of spiritual immunity. Against a background of recognising that there are many forms of attack on or lives, she recommended acceptance of the fact that difficulties will arise. We should therefore build our resources thoughtfully and carefully and choose our confidants with care.
In relation to books, a number of authors were recommended. In the Chat Box, George Lind suggested adding the American writer Sheldon Vanauken, and in particular the book ‘A Severe Mercy’
The Online Event
To experience the session, go to the Watch section of the website.
The Wonders of Immunity - Introduction & Summary |
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