Medellin-based electric power giant EPM announced June 8 that more than 1,000 construction workers at its US$5 billion, 2.4-gigawatt “Hidroituango” hydroelectric project in Antioquia will undergo staggered, voluntary isolation in June and July to avoid possible Covid-19 outbreaks. To date, EPM reports that it has detected 283 cases of Covid-19 infections among Hidroituango