As soon as he had been injected in his left arm, Mr O’Hara felt a “terrible pain” with Kwan hastily packing up his medical supplies and leaving, Mr Makepeace said.
As he left, Ms Yeung remarked that he was the same height as her son causing Mr O’Hara to become suspicious, the court heard.
The victim contacted his GP and the Freeman Hospital to ask about the visit.
Staff said they had never heard of the NHS organisation that arranged the visit so Mr O’Hara went to A&E at the Royal Victoria Infirmary.
After initially being baffled by his symptoms, doctors eventually diagnosed necrotising fasciitis – a “rare, life-threatening flesh-eating disease”, the court heard.
Mr O’Hara had to have multiple surgeries to remove “very considerable portions” of his arm.
He remained in intensive care for several weeks and doctors failed to identify what the toxin was, the court heard.
