Home > Medical > Infectious Diseases > Coronavirus Updated 13 March 2020 WATCH | Could the new coronavirus be 'Disease X'? The World Health Organization has long warned of a mysterious illness - "Disease X" - that could spark an international contagion. 0 In the wake of Covid-19, a World Health Organization committee member said that the virus may be the first to meet the criteria of "Disease X".Image credit: Getty Images Related articles How coronavirus raced through quarantined cruise ship Typical conditions on board cruise ships - how air conditioning systems mix outside air with the inside air to save energy - probably contributed to passengers aboard the Diamond Princess contracting the new coronavirus, an expert says. WATCH | Study confirms: Coronavirus is deadlier in men than in women A large-scale study has found that the mortality rate in men who contracted Covid-19 was significantly higher than in woman who had the virus. Outbreaks like coronavirus start in and spread from the edges of cities The massive increase of the global urban population over the past few decades has increased exposure to diseases and posed new challenges to the control of outbreaks.