23 March 2018
Dryden and Others v Johnson Matthey  UKSC 18 – read judgment
We are all made of stuff, and that stuff is not inert because it’s organic matter. Changes at the molecular level happen all the time, through cell death and replenishment, growth and the constant attrition caused by cosmic radiation on our DNA. Other changes are wrought by the environment or other organisms. Some changes are beneficial, even life saving, such as the removal of an appendix or the insertion of a pacemaker. The production of antibodies by vaccination have eradicated many diseases. Most of the time the body manages this itself. Every time certain cells in the blood encounter a foreign invader, they recruit the immune system to come up with a focussed weapon. This is an antibody, which lies dormant until the threat (the antigen) arises again. Antibodies are good things to have around until they’re provoked by enemies akin to the ones that created them, whereupon the body produces an allergic reaction to get rid of the toxin/allergen.
So, does the triggering of an antibody (an immunoglobulin molecule) constitute tortious injury, sounding in damages? This is the question raised by this case, and it goes to the heart of what “injury” is for the purposes of the law.
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