It has also emerged more than 500 cases have been confirmed in prisons across China.On Friday, Hubei province revised its number of newly confirmed cases to add 220 infections from the province’s prison system. Officials did not say when those infections took place but said that a total of 271 cases, of which 51 had already been counted, had been diagnosed. Of those, 230 were in Wuhan’s women’s prison. The head of the women’s prison has been dismissed.In Rencheng prison in the eastern province of Shandong, 200 prisoners and seven guards tested positive as of Thursday, after infections among correctional officers were first detected last week.