Final answer:
The 1918 influenza pandemic was hindered in its treatment by factors such as the mass movement of troops during World War I and the conditions of the war, resulting in millions of deaths worldwide.
Step-by-step explanation:
The 1918 influenza pandemic was hindered in its treatment by several factors. The mass movement of troops during World War I facilitated the spread of the virus. Additionally, the conditions of the war, such as crowding and poor sanitation, contributed to the dissemination of the virus. As a result, tens of millions of people around the world died from the flu before it eventually burned itself out the following year.