The medicine had already been approved by a US drug regulatory authority and was judged by Hong Kong authorities to meet safety, efficacy and quality requirements.
Two occupational therapists film places chosen by patients and bring the virtual-reality footage to their bedsides, while an intensive-care trial is also being considered.
The rate was more than 13 times Hong Kong’s 0.3 per cent prevalence among the general population, highlighting the potential value of prison-based screening and treatment.
The Centre for Health Protection will continue screening and medical surveillance at Green Heights Elderly Home on Lockhart Road after identifying the cluster.
Hong Kong authorities received 762 enquiries and referred 446 infants and young children for Hospital Authority checks by noon on 26 August, with a health hotline due to close on 28 August.
The Centre for Health Protection said about half of infections have been detected late in recent years and urged people with a history of sexual activity to test at least once.
The government says preliminary screening could exclude cases unrelated to professional conduct or likely to consume substantial resources, but the bill does not specify investigators’ backgrounds or training requirements.