I was shocked to find that my wife and I have been subjected to ‘frailty indexing’ by our GP. This has been done without our knowledge or any explanation as to what it means. Could it also indicate hidden end-of-life planning? I am 78 and healthy. Peter Bradley, Burgess Hill, W. Sussex. Not long after the Covid-19 pandemic commenced, like several million other Britons, I received a letter from my GP saying that I was clinically extremely vulnerable and should shield. This decision had been based on my medical history — as I have written about before, I have sarcoidosis, an inflammatory disorder affecting my lungs. I welcomed the letter, as it was clearly sent in the best interests of my health.