What is the 100-day flu?

The 100-Day Flu is a medical term used to describe the flu pandemic of 1918-1919. The pandemic was caused by the H1N1 virus and was estimated to have killed between 50 and 100 million people worldwide. The virus is believed to have originated from birds and quickly spread to humans, causing widespread illness and death. The 100-Day Flu was particularly severe in the United States, where it caused an estimated 500,000 deaths. The pandemic had a profound impact on society, causing schools and businesses to close and leading to widespread panic. The 100-Day Flu is a reminder of the devastating impact that pandemics can have on human health and society.