Agentur dpa. "But there's never been seen a human to human transmission outside these clusters where we've seen the disease," he said. Bird flu has swept through Indonesia's poultry populations since 2003, killing more than nine million fowl in 21 out of the country's total 33 provinces. In addition to launching nationwide surveillance, officials said they would also tighten biosecurity measures on all animal farms, monitor animal traffic and step up mass-vaccinations to fight any spread of the virus. Indonesia announced in May that the H5N1 virus had jumped from fowl to pigs in the province of Banten nearby Jakarta, with health workers warning that pigs can carry human flu viruses, which can combine with the avian viruses, swap genes, and create virulent new strains. --SP 1326 Local Time 1026 GMT