"In the wake of a cluster of avian flu cases that killed seven members of a rural Indonesian family, it appears likely that there have been many more human-to-human infections than the authorities have previously acknowledged. The numbers are still relatively small, and they do not mean that the virus has mutated to pass easily between people - a change that could touch off a worldwide epidemic. All the clusters of cases have been among relatives or in nurses who were in long, close contact with patients. San Francisco Chronicle, June 5, 2006