We did a dig that showed Spanish Flu started in China in 1917 and was brought over with Chinese labor used in Europe and North America.
"In the new report, Humphries finds archival evidence that a respiratory illness that struck northern China in November 1917 was identified a year later by Chinese health officials as identical to the Spanish flu."
https://www.nationalgeographic.com/news/2014/1/140123-spanish-flu-1918-china-origins-pandemic-science-health/