Vegan diet best for health

I was appalled to read your article on vegetarian diets (WDDTY vol 9 no 8). My wife and I have been vegan for approximately six years. We have found it easier to fight off minor ailments such as colds since we changed our diets. I know of at least 15 studies published between 1982 and 1993 in journals such as the Lancet which show the vegan diet to be not only healthy but useful in treating a variety of ailments. R J Clements, Wolverhampton......