Which pandemic killed thousands in Mexico and millions worldwide in 1918?

The influenza pandemic killed thousands in Mexico and millions worldwide in 1918. The flu spread worldwide and killed many. It killed many of the world population in 1918.

The Influenza Epidemic (Spanish Flu) killed thousands in Mexico and millions worldwide in 1918.

The Influenza Epidemic surprisingly surpassed the total number of people dead in World War I, as more were killed from the epidemic. It ended up killing over more than 50 million people around the world. It was said that the flu pandemic was caused by tension of H1N1 flu and usually went after young, healthy adults.