The threat of disease is intensifying in temporary shelters in the Gaza Strip, where tens of thousands of people fleeing Israeli bombardment are living in cramped conditions, according to the UN emergency relief organization OCHA. Health services in the area have long been overstretched, and fresh waves of displacement ordered by Israeli forces have made their task even more difficult, the UN Office for the Coordination of Humanitarian Affairs said on Saturday. Respiratory infections and diarrhoea are among the most severe diseases in emergency shelters, the head of the World Health Organizati…