I read this book in the early '80s, but it came from my father's bookshelf so could be older. The title was along the lines of 'The (n)th (something) Science Fiction Collection'. I can remember two of the stories in the collection.
One was 'Doll' in which each person had a surrogate doll that protected them from disease and otherwise bolstered their immunity to a disease-ridden environment. The doll would die instead of the owner when a disease was contracted. A village doctor had to shape a new doll from a formless material to replace a dead doll. Each time a baby was born he had to fashion a new one immediately to protect the baby which required great concentration and caused stress to his own doll. In a particular scene he had to make 3 consecutive dolls for a new-born which was suffering until the final doll survived.
Another story which might have been the last in the book may have been titled 'Voyo' or possibly something like 'Hunter'. It was about a damaged 'Voyo', an autonomous AI military tank, that was being hunted by a human soldier in a fiercely hostile environment.