Harding, who heads the National Institute for Health Protection, claimed no-one could have predicted Covid-19 would mutate THERE is so much to comment on in yesterday’s paper. Angus Cochrane’s article on Dido Harding’s ignorance of virus mutation is astounding, since every Scottish schoolchild for at least the last 40 years in my experience, has been taught this by the end of second year (Health professor rubbish UK adviser’s virus mutation comments, February 4). Lesley Riddoch and David Pratt – totally agree we can’t take our eye off the big prize by infighting. Anne Thomson, in the letters pages, has a good point regards the use of troops. No point in only quarantining international flights. Land and sea borders must be similarly treated, with only absolutely essential traffic permitted.