Your answer would be Influenza.
During the year of 1919, there was a global pandemic of a diseased called Infleunza, in other words, it's like a flu, but deadly. A pandemic is when there is an epidemic of a disease that has spread across a large region, in this case, this disease became global. This disease caused people to get sick, die, and pass it on to other people. It started spreading all across the world and most people were getting sick from it, it was a very dangerous time.
