Since an Ebola outbreak was declared in Bunia, a bustling city in northeastern Democratic Republic of Congo, global alarms have gone off. Borders have slammed shut, flights have been diverted as far as the United States and the Congolese World Cup team is currently in quarantine in Belgium. Yet here in Bunia, at the heart of the crisis, the usual signs of an organized response — large medical tents, medics in sealed white suits and goggles and patients lying in strict isolation — are not yet in place. Instead, the incipient aid effort is only getting set up. Outside Bunia’s main hospital on Saturday, workers hammered nails and pushed up tents a few yards from the main door, in a frantic scramble to erect a handful of isolation wards where patients can be triaged, isolated and treated. “The virus is far ahead of us,” said Ahmed Mahat, a manager with International Medical Corps, which is building two of the isolation wards. “And it’s spreading fast.” The world is playing catch-up in Congo. Caught flat-footed by …