Final answer:
The disappearance of male nurses is usually attributed to World War I and the post-war period of history.
Step-by-step explanation:
The disappearance of male nurses is usually attributed to the events of World War I and the post-war period of history. During the war, many men who would have become nurses were instead enlisted in the military. This led to a shortage of male nurses, as they were needed for combat roles. After the war, there was a shift towards nursing being seen as a traditionally female occupation, which further contributed to the decreased number of male nurses.