It was reported on Friday that an analysis has shown that the virus has not mutated, and the WHO has said that there was no evidence so far of human to human transmission.

Other members of the same family are currently ill, but all members have received the Tamiflu antiviral drug.

"I think it is a cluster. The local test from the victim in Pamulang is bird flu positive. The symptoms of the virus are very similar to previous clusters we've had. The parents are also suffering from flu, and we are giving them a full dose of Tamiflu now," said Indonesia's Health Minister, Siti Fadilah Supari.

"The characteristics of germ (the boy had) is very similar (to his sister's), and now their mother and father are suffering from flu. They are all in the Pamulang district," added Supari.

The nurse, whose initials are "C.I.," 25, has been put in isoation at Bandung's Hasan Sadikin Hospital, but officials say that her condition is stable and that her case may be the result of human to human transmission due to the fact that she has not had any contact with poultry.

"We could not confirm whether she is positive of having been infected by avian influenza virus or not, although she had earlier have contacts with siblings, 18-year old Ad and 10-year old Ai, who died of bird flu virus recently," said Hadi Yusuf, chief of the Bird Flu team at Sadikin Hospital.

"When she arrived at this hospital last night, her body temperature was very high, namely 39.6 Celsius degrees but now it has decreased to 37 Celsius degrees. After considering her contact with dead bird flu victims, we declared her a suspected bird flu case. But she is still fully conscious, her breathing problems are not too serious and she's not experiencing chest pain," added Yusuf.

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