The number of cases of cholera reported in Yemen's recent epidemic is likely to have been a tremendous overestimate, sparking fears that other diseases may have been neglected in its wake.

A report by researchers at the Johns Hopkins Center for Humanitarian Health on the response to the 2016-18 outbreak warns that a combination of incentives paid to health workers - some of whom had received no salaries for up to a year - and poor testing and surveillance systems meant that the number of cases was an overestimate.