U.N. Secretary-General Antonio Guterres warned Tuesday that the world faces the most challenging crisis since World War II, confronting a pandemic threatening people in every country, one that will bring a recession “that probably has no parallel in the recent past.”There is also a risk that the combination of the disease and its economic impact will contribute to “enhanced instability, enhanced unrest, and enhanced conflict,” the U.N. chief said at the launch of a report on the socioeconomic impacts of COVID-19.Guterres called for a much stronger and more effective global response to the coronavirus pandemic and to the social and economic devastation that COVID-19 is causing.We are facing a global health crisis unlike any in the 75-y