Prints and photographs document visually the history and development of medicine from early times to recent decades. The NLM collection includes fine prints, historical and contemporary photographic processes, posters, and ephemera such as patent medicine trade cards. Collecting emphasis is on works that depict twentieth-century health personnel at work; portraits of health professionals and biomedical scientists who have contributed to the development of medicine; images of health institutions such as hospitals and medical schools; fine prints with medically related themes; and public health posters. International images and images of marginalized groups are actively sought. Images reproduced from existing works are also selectively added to the prints and photographs collection.