The true number of coronavirus cases at the epicenter of the outbreak could be 10 times higher than what Chinese officials have reported, according to new research.

As of Friday, the number of cases of the coronavirus has officially reached at least 9,800, with 213 deaths, according to the World Health Organization and Chinese data. Hong Kong-based outside researchers estimated in an analysis released Friday, however, that the actual number of people infected in Wuhan could actually be about 75,815.