The 1918 influenza pandemic remains the deadliest in modern history, killing tens of millions — and leaving scientists with enduring questions about how it began. A century later, a virologist and ...

Although researchers continue to debate the exact location where the pandemic began, there is no credible evidence that anything other than H1N1, a type of influenza A virus, was responsible for it.

A groundbreaking study by researchers from the Universities of Basel and Zurich has unlocked one of the most significant viral mysteries of the 20th century. By decoding the genome of the 1918 ...

For years, internet users have shared a rumor about U.S. Health Secretary Robert F. Kennedy Jr. falsely claiming that vaccines caused the 1918-1919 influenza pandemic known as the Spanish flu. One ...