Is it true: 1918 Spanish flu origins / Camp Funston theory?

There's no solid evidence for it.

Claim: the 1918 pandemic began at Camp Funston, Kansas. Unsubstantiated: the origin has not been established. A large outbreak at Camp Funston from 4 March 1918 is documented, but a 2019 review by Worobey, Cox and Gill (Evolution, Medicine, and Public Health) concluded it was probably not the first large outbreak, since the Funston outbreak was mild and New York City had already recorded very high influenza mortality. John Barry (2004) argues for Haskell County, Kansas, in early 1918 as the most likely site, while acknowledging that the question cannot be settled with absolute certainty; no tissue samples from the cases are known. The rival hypotheses (Étaples, France, 1916-17, argued by John Oxford and colleagues from 2002; the Chinese Labour Corps, 1917-18, argued by Mark Humphries in 2014) are also unconfirmed. A 2006 review in the CDC's Emerging Infectious Diseases judged that historical and epidemiologic data are inadequate to identify the geographic origin. Separately, the 'Spanish' name is a misnomer from wartime press censorship.