After at least 24 children died of unknown diseases in the region in recent months Odisha has intensified health awareness campaign in tribal-populated Malkangiri district an official said on Thursday. The awareness campaign was launched after the children between two and five years of age died in five villages of the district in September and October chief district medical officer Sashibhushan Panda told IANS. The highest deaths of eight each occurred in Potrel and Usakapalli villages about 25 km from the district headquarters town of Malkangiri he added. The children who died had mild fever and swelling of eyes noses