Spanish flu refers to the global influenza pandemic that occurred from 1918 to 1920, infecting millions of people worldwide and causing a significant number of deaths.
Related terms
Pandemic: A pandemic is an outbreak of a disease that occurs over a wide geographic area and affects an exceptionally high proportion of the population.
Influenza: Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses.
Mortality Rate: The mortality rate refers to the measure of the number of deaths in relation to the population size. It indicates how lethal a disease or condition is.