A man who was swapped shortly after his birth and has never found his real mother called yesterday for the health chief to step down after the latest baby-swap blunder. Kelvin Li Kwok-yin, 32, said it was unacceptable that there should be a repetition three decades after his case and York Chow Yat-ngok should take personal responsibility. 'It is outrageous. I am angrier hearing of the recent swapping than when I discovered I had been swapped.' Mr Li was speaking after two babies were swapped shortly after birth at Queen Elizabeth Hospital on August 7 in a mix-up that was discovered by one of the mothers the next day but which Dr Chow did not learn of until early on Monday - after it had been made public on Sunday night. Mr Li said Dr Chow should resign because he had failed in his role in monitoring the Hospital Authority, even after his own case came to light more than a year ago. Mr Li discovered two years ago that he had been swapped when his sister realised that his blood type meant he could not possibly be his mother's natural son. Subsequent DNA tests proved he had been swapped. Yesterday he said the government had failed to follow up on the flaws in the health care system indicated by his case. 'Its response is even slower than Ma Ying-jeou's,' he said, referring to the Taiwanese president, who is under heavy criticism for his government's slow reaction to the disaster caused by Typhoon Morakot. Queen Elizabeth Hospital launched a series of improvement measures shortly after the incident was revealed to the public on Sunday. In future, babies will have two ankle bracelets instead of a wrist bracelet and ankle bracelet as at present, because wrist bracelets are more prone to dropping off. Before putting on the second ankle bracelet, nursery staff must sign a declaration to confirm the baby's identity. But so far the measures have only been introduced at Queen Elizabeth Hospital. A spokesman said the Hospital Authority would look into the possibility of launching general improvement measures after a five-member investigation panel delivered a report on the baby swap in four weeks. 'We will wait until then to see if the improvement measures are applicable to other public hospitals,' he said. A Food and Health Bureau spokeswoman said monitoring and training of frontline staff in public hospitals should be enhanced. 'The Secretary for Food and Health was upset about the incident of mixing up of babies ... and considers that such incidents should not occur,' she said. 'The Hospital Authority will submit a report to the bureau on its investigation.'