An immigration officer who was seriously burnt in the abode-seekers' arson attack may be able to leave hospital within a fortnight. Choi To, 37, and two abode-seekers, Pang Hon-kwan, 39, and Wong Yan-chung, 26, remained in serious condition yesterday despite recovering enough to be transferred from intensive care at the Prince of Wales Hospital to the burns unit last week. Senior immigration officer Leung Kam-kwong, 42, and abode-seeker Lam Siu-sing, 26, died on Friday after suffering serious burns during the attack at Immigration Tower on August 2 which injured 50 people. Pang and Chow Siu-ping, 26, have been charged with the murder of Leung and accused of arson and wounding with 19 other defendants who appeared in court last Thursday charged with arson and wounding. Pang and Chow were remanded in custody yesterday and the case adjourned until September 7, when the 19 other accused will also appear in court. Mr Choi, Pang and Wong, who had burns to 20 to 25 per cent of their bodies, received five to 10 per cent skin grafts last week using their own skin. The remaining burns are being allowed to heal by themselves, although two may need further grafts if skin growth is too slow, doctors say. 'At this stage, all of the grafts are looking healthy. But infection is the biggest enemy to burn patients in the second week [of treatment], so we need to isolate the patients in order to minimise the risk of infections,' honorary chief of surgery Professor Joseph Lau Wan-yee said. The hospital said one of the three victims was suffering from a lung infection, but Professor Lau, also chairman of the department of surgery at the Chinese University of Hong Kong, expected all three patients to be discharged in 10 days to two weeks 'if things go well'. Meanwhile, Professor Andrew Burd, chief of the division of plastic surgery at the university, warned the victims might never fully recover from the psychological trauma. 'It will take several weeks for the lung to recover, it will take several years for the skin to heal. But very often, the psychological injuries would take perhaps a lifetime for patients to overcome,' he said. The injuries of the three patients are concentrated on their upper bodies. Professor Burd said the facial burns were not too deep and could be healed without grafting. The worst burns were around the wrist, but there would be a full functional recovery. 'Scars are always permanent. Once you have a skin graft, you will never look normal again. So our objective is to minimise the effect of the scars,' he said. Professor Lau said that like other burns patients, the three victims were distressed and would need time to come to terms with their wounds. Last night 12 patients, including four immigration officers, remained in hospital.