Expressing alarm both about mounting infections and slow government responses, the World Health Organization declared Wednesday that the global coronavirus crisis is now a pandemic but also said it's not too late for countries to act.By reversing course and using the charged word “pandemic” that it had previously shied away from, the U.N. health agency appeared to want to shock lethargic countries into pulling out all the stops. “We have called every day for countries to take urgent and agg