pandemic

Scientists ascertained why the Spanish flu had been so fatal

The Spanish flu, one of the most deadly diseases in the history of humankind, emerged in 1918-1920. It is estimated that it caused the death of 100 million people all over the world. There were much more victims than during WW1. Why was this disease so lethal and why did almost 5% of the world population die? The Spanish flu was caused by the...